Removed Polymer from Observatory deps

packages/polymer_interop/lib/src/js/polymer.js

-/**
- * @license
- * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
- * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
- * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
- * Code distributed by Google as part of the polymer project is also
- * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
- */
-// @version 0.5.5
-window.PolymerGestures = {};
-
-(function(scope) {
-  var hasFullPath = false;
-
-  // test for full event path support
-  var pathTest = document.createElement('meta');
-  if (pathTest.createShadowRoot) {
-    var sr = pathTest.createShadowRoot();
-    var s = document.createElement('span');
-    sr.appendChild(s);
-    pathTest.addEventListener('testpath', function(ev) {
-      if (ev.path) {
-        // if the span is in the event path, then path[0] is the real source for all events
-        hasFullPath = ev.path[0] === s;
-      }
-      ev.stopPropagation();
-    });
-    var ev = new CustomEvent('testpath', {bubbles: true});
-    // must add node to DOM to trigger event listener
-    document.head.appendChild(pathTest);
-    s.dispatchEvent(ev);
-    pathTest.parentNode.removeChild(pathTest);
-    sr = s = null;
-  }
-  pathTest = null;
-
-  var target = {
-    shadow: function(inEl) {
-      if (inEl) {
-        return inEl.shadowRoot || inEl.webkitShadowRoot;
-      }
-    },
-    canTarget: function(shadow) {
-      return shadow && Boolean(shadow.elementFromPoint);
-    },
-    targetingShadow: function(inEl) {
-      var s = this.shadow(inEl);
-      if (this.canTarget(s)) {
-        return s;
-      }
-    },
-    olderShadow: function(shadow) {
-      var os = shadow.olderShadowRoot;
-      if (!os) {
-        var se = shadow.querySelector('shadow');
-        if (se) {
-          os = se.olderShadowRoot;
-        }
-      }
-      return os;
-    },
-    allShadows: function(element) {
-      var shadows = [], s = this.shadow(element);
-      while(s) {
-        shadows.push(s);
-        s = this.olderShadow(s);
-      }
-      return shadows;
-    },
-    searchRoot: function(inRoot, x, y) {
-      var t, st, sr, os;
-      if (inRoot) {
-        t = inRoot.elementFromPoint(x, y);
-        if (t) {
-          // found element, check if it has a ShadowRoot
-          sr = this.targetingShadow(t);
-        } else if (inRoot !== document) {
-          // check for sibling roots
-          sr = this.olderShadow(inRoot);
-        }
-        // search other roots, fall back to light dom element
-        return this.searchRoot(sr, x, y) || t;
-      }
-    },
-    owner: function(element) {
-      if (!element) {
-        return document;
-      }
-      var s = element;
-      // walk up until you hit the shadow root or document
-      while (s.parentNode) {
-        s = s.parentNode;
-      }
-      // the owner element is expected to be a Document or ShadowRoot
-      if (s.nodeType != Node.DOCUMENT_NODE && s.nodeType != Node.DOCUMENT_FRAGMENT_NODE) {
-        s = document;
-      }
-      return s;
-    },
-    findTarget: function(inEvent) {
-      if (hasFullPath && inEvent.path && inEvent.path.length) {
-        return inEvent.path[0];
-      }
-      var x = inEvent.clientX, y = inEvent.clientY;
-      // if the listener is in the shadow root, it is much faster to start there
-      var s = this.owner(inEvent.target);
-      // if x, y is not in this root, fall back to document search
-      if (!s.elementFromPoint(x, y)) {
-        s = document;
-      }
-      return this.searchRoot(s, x, y);
-    },
-    findTouchAction: function(inEvent) {
-      var n;
-      if (hasFullPath && inEvent.path && inEvent.path.length) {
-        var path = inEvent.path;
-        for (var i = 0; i < path.length; i++) {
-          n = path[i];
-          if (n.nodeType === Node.ELEMENT_NODE && n.hasAttribute('touch-action')) {
-            return n.getAttribute('touch-action');
-          }
-        }
-      } else {
-        n = inEvent.target;
-        while(n) {
-          if (n.nodeType === Node.ELEMENT_NODE && n.hasAttribute('touch-action')) {
-            return n.getAttribute('touch-action');
-          }
-          n = n.parentNode || n.host;
-        }
-      }
-      // auto is default
-      return "auto";
-    },
-    LCA: function(a, b) {
-      if (a === b) {
-        return a;
-      }
-      if (a && !b) {
-        return a;
-      }
-      if (b && !a) {
-        return b;
-      }
-      if (!b && !a) {
-        return document;
-      }
-      // fast case, a is a direct descendant of b or vice versa
-      if (a.contains && a.contains(b)) {
-        return a;
-      }
-      if (b.contains && b.contains(a)) {
-        return b;
-      }
-      var adepth = this.depth(a);
-      var bdepth = this.depth(b);
-      var d = adepth - bdepth;
-      if (d >= 0) {
-        a = this.walk(a, d);
-      } else {
-        b = this.walk(b, -d);
-      }
-      while (a && b && a !== b) {
-        a = a.parentNode || a.host;
-        b = b.parentNode || b.host;
-      }
-      return a;
-    },
-    walk: function(n, u) {
-      for (var i = 0; n && (i < u); i++) {
-        n = n.parentNode || n.host;
-      }
-      return n;
-    },
-    depth: function(n) {
-      var d = 0;
-      while(n) {
-        d++;
-        n = n.parentNode || n.host;
-      }
-      return d;
-    },
-    deepContains: function(a, b) {
-      var common = this.LCA(a, b);
-      // if a is the common ancestor, it must "deeply" contain b
-      return common === a;
-    },
-    insideNode: function(node, x, y) {
-      var rect = node.getBoundingClientRect();
-      return (rect.left <= x) && (x <= rect.right) && (rect.top <= y) && (y <= rect.bottom);
-    },
-    path: function(event) {
-      var p;
-      if (hasFullPath && event.path && event.path.length) {
-        p = event.path;
-      } else {
-        p = [];
-        var n = this.findTarget(event);
-        while (n) {
-          p.push(n);
-          n = n.parentNode || n.host;
-        }
-      }
-      return p;
-    }
-  };
-  scope.targetFinding = target;
-  /**
-   * Given an event, finds the "deepest" node that could have been the original target before ShadowDOM retargetting
-   *
-   * @param {Event} Event An event object with clientX and clientY properties
-   * @return {Element} The probable event origninator
-   */
-  scope.findTarget = target.findTarget.bind(target);
-  /**
-   * Determines if the "container" node deeply contains the "containee" node, including situations where the "containee" is contained by one or more ShadowDOM
-   * roots.
-   *
-   * @param {Node} container
-   * @param {Node} containee
-   * @return {Boolean}
-   */
-  scope.deepContains = target.deepContains.bind(target);
-
-  /**
-   * Determines if the x/y position is inside the given node.
-   *
-   * Example:
-   *
-   *     function upHandler(event) {
-   *       var innode = PolymerGestures.insideNode(event.target, event.clientX, event.clientY);
-   *       if (innode) {
-   *         // wait for tap?
-   *       } else {
-   *         // tap will never happen
-   *       }
-   *     }
-   *
-   * @param {Node} node
-   * @param {Number} x Screen X position
-   * @param {Number} y screen Y position
-   * @return {Boolean}
-   */
-  scope.insideNode = target.insideNode;
-
-})(window.PolymerGestures);
-
-(function() {
-  function shadowSelector(v) {
-    return 'html /deep/ ' + selector(v);
-  }
-  function selector(v) {
-    return '[touch-action="' + v + '"]';
-  }
-  function rule(v) {
-    return '{ -ms-touch-action: ' + v + '; touch-action: ' + v + ';}';
-  }
-  var attrib2css = [
-    'none',
-    'auto',
-    'pan-x',
-    'pan-y',
-    {
-      rule: 'pan-x pan-y',
-      selectors: [
-        'pan-x pan-y',
-        'pan-y pan-x'
-      ]
-    },
-    'manipulation'
-  ];
-  var styles = '';
-  // only install stylesheet if the browser has touch action support
-  var hasTouchAction = typeof document.head.style.touchAction === 'string';
-  // only add shadow selectors if shadowdom is supported
-  var hasShadowRoot = !window.ShadowDOMPolyfill && document.head.createShadowRoot;
-
-  if (hasTouchAction) {
-    attrib2css.forEach(function(r) {
-      if (String(r) === r) {
-        styles += selector(r) + rule(r) + '\n';
-        if (hasShadowRoot) {
-          styles += shadowSelector(r) + rule(r) + '\n';
-        }
-      } else {
-        styles += r.selectors.map(selector) + rule(r.rule) + '\n';
-        if (hasShadowRoot) {
-          styles += r.selectors.map(shadowSelector) + rule(r.rule) + '\n';
-        }
-      }
-    });
-
-    var el = document.createElement('style');
-    el.textContent = styles;
-    document.head.appendChild(el);
-  }
-})();
-
-/**
- * This is the constructor for new PointerEvents.
- *
- * New Pointer Events must be given a type, and an optional dictionary of
- * initialization properties.
- *
- * Due to certain platform requirements, events returned from the constructor
- * identify as MouseEvents.
- *
- * @constructor
- * @param {String} inType The type of the event to create.
- * @param {Object} [inDict] An optional dictionary of initial event properties.
- * @return {Event} A new PointerEvent of type `inType` and initialized with properties from `inDict`.
- */
-(function(scope) {
-
-  var MOUSE_PROPS = [
-    'bubbles',
-    'cancelable',
-    'view',
-    'detail',
-    'screenX',
-    'screenY',
-    'clientX',
-    'clientY',
-    'ctrlKey',
-    'altKey',
-    'shiftKey',
-    'metaKey',
-    'button',
-    'relatedTarget',
-    'pageX',
-    'pageY'
-  ];
-
-  var MOUSE_DEFAULTS = [
-    false,
-    false,
-    null,
-    null,
-    0,
-    0,
-    0,
-    0,
-    false,
-    false,
-    false,
-    false,
-    0,
-    null,
-    0,
-    0
-  ];
-
-  var NOP_FACTORY = function(){ return function(){}; };
-
-  var eventFactory = {
-    // TODO(dfreedm): this is overridden by tap recognizer, needs review
-    preventTap: NOP_FACTORY,
-    makeBaseEvent: function(inType, inDict) {
-      var e = document.createEvent('Event');
-      e.initEvent(inType, inDict.bubbles || false, inDict.cancelable || false);
-      e.preventTap = eventFactory.preventTap(e);
-      return e;
-    },
-    makeGestureEvent: function(inType, inDict) {
-      inDict = inDict || Object.create(null);
-
-      var e = this.makeBaseEvent(inType, inDict);
-      for (var i = 0, keys = Object.keys(inDict), k; i < keys.length; i++) {
-        k = keys[i];
-        if( k !== 'bubbles' && k !== 'cancelable' ) {
-           e[k] = inDict[k];
-        }
-      }
-      return e;
-    },
-    makePointerEvent: function(inType, inDict) {
-      inDict = inDict || Object.create(null);
-
-      var e = this.makeBaseEvent(inType, inDict);
-      // define inherited MouseEvent properties
-      for(var i = 2, p; i < MOUSE_PROPS.length; i++) {
-        p = MOUSE_PROPS[i];
-        e[p] = inDict[p] || MOUSE_DEFAULTS[i];
-      }
-      e.buttons = inDict.buttons || 0;
-
-      // Spec requires that pointers without pressure specified use 0.5 for down
-      // state and 0 for up state.
-      var pressure = 0;
-      if (inDict.pressure) {
-        pressure = inDict.pressure;
-      } else {
-        pressure = e.buttons ? 0.5 : 0;
-      }
-
-      // add x/y properties aliased to clientX/Y
-      e.x = e.clientX;
-      e.y = e.clientY;
-
-      // define the properties of the PointerEvent interface
-      e.pointerId = inDict.pointerId || 0;
-      e.width = inDict.width || 0;
-      e.height = inDict.height || 0;
-      e.pressure = pressure;
-      e.tiltX = inDict.tiltX || 0;
-      e.tiltY = inDict.tiltY || 0;
-      e.pointerType = inDict.pointerType || '';
-      e.hwTimestamp = inDict.hwTimestamp || 0;
-      e.isPrimary = inDict.isPrimary || false;
-      e._source = inDict._source || '';
-      return e;
-    }
-  };
-
-  scope.eventFactory = eventFactory;
-})(window.PolymerGestures);
-
-/**
- * This module implements an map of pointer states
- */
-(function(scope) {
-  var USE_MAP = window.Map && window.Map.prototype.forEach;
-  var POINTERS_FN = function(){ return this.size; };
-  function PointerMap() {
-    if (USE_MAP) {
-      var m = new Map();
-      m.pointers = POINTERS_FN;
-      return m;
-    } else {
-      this.keys = [];
-      this.values = [];
-    }
-  }
-
-  PointerMap.prototype = {
-    set: function(inId, inEvent) {
-      var i = this.keys.indexOf(inId);
-      if (i > -1) {
-        this.values[i] = inEvent;
-      } else {
-        this.keys.push(inId);
-        this.values.push(inEvent);
-      }
-    },
-    has: function(inId) {
-      return this.keys.indexOf(inId) > -1;
-    },
-    'delete': function(inId) {
-      var i = this.keys.indexOf(inId);
-      if (i > -1) {
-        this.keys.splice(i, 1);
-        this.values.splice(i, 1);
-      }
-    },
-    get: function(inId) {
-      var i = this.keys.indexOf(inId);
-      return this.values[i];
-    },
-    clear: function() {
-      this.keys.length = 0;
-      this.values.length = 0;
-    },
-    // return value, key, map
-    forEach: function(callback, thisArg) {
-      this.values.forEach(function(v, i) {
-        callback.call(thisArg, v, this.keys[i], this);
-      }, this);
-    },
-    pointers: function() {
-      return this.keys.length;
-    }
-  };
-
-  scope.PointerMap = PointerMap;
-})(window.PolymerGestures);
-
-(function(scope) {
-  var CLONE_PROPS = [
-    // MouseEvent
-    'bubbles',
-    'cancelable',
-    'view',
-    'detail',
-    'screenX',
-    'screenY',
-    'clientX',
-    'clientY',
-    'ctrlKey',
-    'altKey',
-    'shiftKey',
-    'metaKey',
-    'button',
-    'relatedTarget',
-    // DOM Level 3
-    'buttons',
-    // PointerEvent
-    'pointerId',
-    'width',
-    'height',
-    'pressure',
-    'tiltX',
-    'tiltY',
-    'pointerType',
-    'hwTimestamp',
-    'isPrimary',
-    // event instance
-    'type',
-    'target',
-    'currentTarget',
-    'which',
-    'pageX',
-    'pageY',
-    'timeStamp',
-    // gesture addons
-    'preventTap',
-    'tapPrevented',
-    '_source'
-  ];
-
-  var CLONE_DEFAULTS = [
-    // MouseEvent
-    false,
-    false,
-    null,
-    null,
-    0,
-    0,
-    0,
-    0,
-    false,
-    false,
-    false,
-    false,
-    0,
-    null,
-    // DOM Level 3
-    0,
-    // PointerEvent
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    '',
-    0,
-    false,
-    // event instance
-    '',
-    null,
-    null,
-    0,
-    0,
-    0,
-    0,
-    function(){},
-    false
-  ];
-
-  var HAS_SVG_INSTANCE = (typeof SVGElementInstance !== 'undefined');
-
-  var eventFactory = scope.eventFactory;
-
-  // set of recognizers to run for the currently handled event
-  var currentGestures;
-
-  /**
-   * This module is for normalizing events. Mouse and Touch events will be
-   * collected here, and fire PointerEvents that have the same semantics, no
-   * matter the source.
-   * Events fired:
-   *   - pointerdown: a pointing is added
-   *   - pointerup: a pointer is removed
-   *   - pointermove: a pointer is moved
-   *   - pointerover: a pointer crosses into an element
-   *   - pointerout: a pointer leaves an element
-   *   - pointercancel: a pointer will no longer generate events
-   */
-  var dispatcher = {
-    IS_IOS: false,
-    pointermap: new scope.PointerMap(),
-    requiredGestures: new scope.PointerMap(),
-    eventMap: Object.create(null),
-    // Scope objects for native events.
-    // This exists for ease of testing.
-    eventSources: Object.create(null),
-    eventSourceList: [],
-    gestures: [],
-    // map gesture event -> {listeners: int, index: gestures[int]}
-    dependencyMap: {
-      // make sure down and up are in the map to trigger "register"
-      down: {listeners: 0, index: -1},
-      up: {listeners: 0, index: -1}
-    },
-    gestureQueue: [],
-    /**
-     * Add a new event source that will generate pointer events.
-     *
-     * `inSource` must contain an array of event names named `events`, and
-     * functions with the names specified in the `events` array.
-     * @param {string} name A name for the event source
-     * @param {Object} source A new source of platform events.
-     */
-    registerSource: function(name, source) {
-      var s = source;
-      var newEvents = s.events;
-      if (newEvents) {
-        newEvents.forEach(function(e) {
-          if (s[e]) {
-            this.eventMap[e] = s[e].bind(s);
-          }
-        }, this);
-        this.eventSources[name] = s;
-        this.eventSourceList.push(s);
-      }
-    },
-    registerGesture: function(name, source) {
-      var obj = Object.create(null);
-      obj.listeners = 0;
-      obj.index = this.gestures.length;
-      for (var i = 0, g; i < source.exposes.length; i++) {
-        g = source.exposes[i].toLowerCase();
-        this.dependencyMap[g] = obj;
-      }
-      this.gestures.push(source);
-    },
-    register: function(element, initial) {
-      var l = this.eventSourceList.length;
-      for (var i = 0, es; (i < l) && (es = this.eventSourceList[i]); i++) {
-        // call eventsource register
-        es.register.call(es, element, initial);
-      }
-    },
-    unregister: function(element) {
-      var l = this.eventSourceList.length;
-      for (var i = 0, es; (i < l) && (es = this.eventSourceList[i]); i++) {
-        // call eventsource register
-        es.unregister.call(es, element);
-      }
-    },
-    // EVENTS
-    down: function(inEvent) {
-      this.requiredGestures.set(inEvent.pointerId, currentGestures);
-      this.fireEvent('down', inEvent);
-    },
-    move: function(inEvent) {
-      // pipe move events into gesture queue directly
-      inEvent.type = 'move';
-      this.fillGestureQueue(inEvent);
-    },
-    up: function(inEvent) {
-      this.fireEvent('up', inEvent);
-      this.requiredGestures.delete(inEvent.pointerId);
-    },
-    cancel: function(inEvent) {
-      inEvent.tapPrevented = true;
-      this.fireEvent('up', inEvent);
-      this.requiredGestures.delete(inEvent.pointerId);
-    },
-    addGestureDependency: function(node, currentGestures) {
-      var gesturesWanted = node._pgEvents;
-      if (gesturesWanted && currentGestures) {
-        var gk = Object.keys(gesturesWanted);
-        for (var i = 0, r, ri, g; i < gk.length; i++) {
-          // gesture
-          g = gk[i];
-          if (gesturesWanted[g] > 0) {
-            // lookup gesture recognizer
-            r = this.dependencyMap[g];
-            // recognizer index
-            ri = r ? r.index : -1;
-            currentGestures[ri] = true;
-          }
-        }
-      }
-    },
-    // LISTENER LOGIC
-    eventHandler: function(inEvent) {
-      // This is used to prevent multiple dispatch of events from
-      // platform events. This can happen when two elements in different scopes
-      // are set up to create pointer events, which is relevant to Shadow DOM.
-
-      var type = inEvent.type;
-
-      // only generate the list of desired events on "down"
-      if (type === 'touchstart' || type === 'mousedown' || type === 'pointerdown' || type === 'MSPointerDown') {
-        if (!inEvent._handledByPG) {
-          currentGestures = {};
-        }
-
-        // in IOS mode, there is only a listener on the document, so this is not re-entrant
-        if (this.IS_IOS) {
-          var ev = inEvent;
-          if (type === 'touchstart') {
-            var ct = inEvent.changedTouches[0];
-            // set up a fake event to give to the path builder
-            ev = {target: inEvent.target, clientX: ct.clientX, clientY: ct.clientY, path: inEvent.path};
-          }
-          // use event path if available, otherwise build a path from target finding
-          var nodes = inEvent.path || scope.targetFinding.path(ev);
-          for (var i = 0, n; i < nodes.length; i++) {
-            n = nodes[i];
-            this.addGestureDependency(n, currentGestures);
-          }
-        } else {
-          this.addGestureDependency(inEvent.currentTarget, currentGestures);
-        }
-      }
-
-      if (inEvent._handledByPG) {
-        return;
-      }
-      var fn = this.eventMap && this.eventMap[type];
-      if (fn) {
-        fn(inEvent);
-      }
-      inEvent._handledByPG = true;
-    },
-    // set up event listeners
-    listen: function(target, events) {
-      for (var i = 0, l = events.length, e; (i < l) && (e = events[i]); i++) {
-        this.addEvent(target, e);
-      }
-    },
-    // remove event listeners
-    unlisten: function(target, events) {
-      for (var i = 0, l = events.length, e; (i < l) && (e = events[i]); i++) {
-        this.removeEvent(target, e);
-      }
-    },
-    addEvent: function(target, eventName) {
-      target.addEventListener(eventName, this.boundHandler);
-    },
-    removeEvent: function(target, eventName) {
-      target.removeEventListener(eventName, this.boundHandler);
-    },
-    // EVENT CREATION AND TRACKING
-    /**
-     * Creates a new Event of type `inType`, based on the information in
-     * `inEvent`.
-     *
-     * @param {string} inType A string representing the type of event to create
-     * @param {Event} inEvent A platform event with a target
-     * @return {Event} A PointerEvent of type `inType`
-     */
-    makeEvent: function(inType, inEvent) {
-      var e = eventFactory.makePointerEvent(inType, inEvent);
-      e.preventDefault = inEvent.preventDefault;
-      e.tapPrevented = inEvent.tapPrevented;
-      e._target = e._target || inEvent.target;
-      return e;
-    },
-    // make and dispatch an event in one call
-    fireEvent: function(inType, inEvent) {
-      var e = this.makeEvent(inType, inEvent);
-      return this.dispatchEvent(e);
-    },
-    /**
-     * Returns a snapshot of inEvent, with writable properties.
-     *
-     * @param {Event} inEvent An event that contains properties to copy.
-     * @return {Object} An object containing shallow copies of `inEvent`'s
-     *    properties.
-     */
-    cloneEvent: function(inEvent) {
-      var eventCopy = Object.create(null), p;
-      for (var i = 0; i < CLONE_PROPS.length; i++) {
-        p = CLONE_PROPS[i];
-        eventCopy[p] = inEvent[p] || CLONE_DEFAULTS[i];
-        // Work around SVGInstanceElement shadow tree
-        // Return the <use> element that is represented by the instance for Safari, Chrome, IE.
-        // This is the behavior implemented by Firefox.
-        if (p === 'target' || p === 'relatedTarget') {
-          if (HAS_SVG_INSTANCE && eventCopy[p] instanceof SVGElementInstance) {
-            eventCopy[p] = eventCopy[p].correspondingUseElement;
-          }
-        }
-      }
-      // keep the semantics of preventDefault
-      eventCopy.preventDefault = function() {
-        inEvent.preventDefault();
-      };
-      return eventCopy;
-    },
-    /**
-     * Dispatches the event to its target.
-     *
-     * @param {Event} inEvent The event to be dispatched.
-     * @return {Boolean} True if an event handler returns true, false otherwise.
-     */
-    dispatchEvent: function(inEvent) {
-      var t = inEvent._target;
-      if (t) {
-        t.dispatchEvent(inEvent);
-        // clone the event for the gesture system to process
-        // clone after dispatch to pick up gesture prevention code
-        var clone = this.cloneEvent(inEvent);
-        clone.target = t;
-        this.fillGestureQueue(clone);
-      }
-    },
-    gestureTrigger: function() {
-      // process the gesture queue
-      for (var i = 0, e, rg; i < this.gestureQueue.length; i++) {
-        e = this.gestureQueue[i];
-        rg = e._requiredGestures;
-        if (rg) {
-          for (var j = 0, g, fn; j < this.gestures.length; j++) {
-            // only run recognizer if an element in the source event's path is listening for those gestures
-            if (rg[j]) {
-              g = this.gestures[j];
-              fn = g[e.type];
-              if (fn) {
-                fn.call(g, e);
-              }
-            }
-          }
-        }
-      }
-      this.gestureQueue.length = 0;
-    },
-    fillGestureQueue: function(ev) {
-      // only trigger the gesture queue once
-      if (!this.gestureQueue.length) {
-        requestAnimationFrame(this.boundGestureTrigger);
-      }
-      ev._requiredGestures = this.requiredGestures.get(ev.pointerId);
-      this.gestureQueue.push(ev);
-    }
-  };
-  dispatcher.boundHandler = dispatcher.eventHandler.bind(dispatcher);
-  dispatcher.boundGestureTrigger = dispatcher.gestureTrigger.bind(dispatcher);
-  scope.dispatcher = dispatcher;
-
-  /**
-   * Listen for `gesture` on `node` with the `handler` function
-   *
-   * If `handler` is the first listener for `gesture`, the underlying gesture recognizer is then enabled.
-   *
-   * @param {Element} node
-   * @param {string} gesture
-   * @return Boolean `gesture` is a valid gesture
-   */
-  scope.activateGesture = function(node, gesture) {
-    var g = gesture.toLowerCase();
-    var dep = dispatcher.dependencyMap[g];
-    if (dep) {
-      var recognizer = dispatcher.gestures[dep.index];
-      if (!node._pgListeners) {
-        dispatcher.register(node);
-        node._pgListeners = 0;
-      }
-      // TODO(dfreedm): re-evaluate bookkeeping to avoid using attributes
-      if (recognizer) {
-        var touchAction = recognizer.defaultActions && recognizer.defaultActions[g];
-        var actionNode;
-        switch(node.nodeType) {
-          case Node.ELEMENT_NODE:
-            actionNode = node;
-          break;
-          case Node.DOCUMENT_FRAGMENT_NODE:
-            actionNode = node.host;
-          break;
-          default:
-            actionNode = null;
-          break;
-        }
-        if (touchAction && actionNode && !actionNode.hasAttribute('touch-action')) {
-          actionNode.setAttribute('touch-action', touchAction);
-        }
-      }
-      if (!node._pgEvents) {
-        node._pgEvents = {};
-      }
-      node._pgEvents[g] = (node._pgEvents[g] || 0) + 1;
-      node._pgListeners++;
-    }
-    return Boolean(dep);
-  };
-
-  /**
-   *
-   * Listen for `gesture` from `node` with `handler` function.
-   *
-   * @param {Element} node
-   * @param {string} gesture
-   * @param {Function} handler
-   * @param {Boolean} capture
-   */
-  scope.addEventListener = function(node, gesture, handler, capture) {
-    if (handler) {
-      scope.activateGesture(node, gesture);
-      node.addEventListener(gesture, handler, capture);
-    }
-  };
-
-  /**
-   * Tears down the gesture configuration for `node`
-   *
-   * If `handler` is the last listener for `gesture`, the underlying gesture recognizer is disabled.
-   *
-   * @param {Element} node
-   * @param {string} gesture
-   * @return Boolean `gesture` is a valid gesture
-   */
-  scope.deactivateGesture = function(node, gesture) {
-    var g = gesture.toLowerCase();
-    var dep = dispatcher.dependencyMap[g];
-    if (dep) {
-      if (node._pgListeners > 0) {
-        node._pgListeners--;
-      }
-      if (node._pgListeners === 0) {
-        dispatcher.unregister(node);
-      }
-      if (node._pgEvents) {
-        if (node._pgEvents[g] > 0) {
-          node._pgEvents[g]--;
-        } else {
-          node._pgEvents[g] = 0;
-        }
-      }
-    }
-    return Boolean(dep);
-  };
-
-  /**
-   * Stop listening for `gesture` from `node` with `handler` function.
-   *
-   * @param {Element} node
-   * @param {string} gesture
-   * @param {Function} handler
-   * @param {Boolean} capture
-   */
-  scope.removeEventListener = function(node, gesture, handler, capture) {
-    if (handler) {
-      scope.deactivateGesture(node, gesture);
-      node.removeEventListener(gesture, handler, capture);
-    }
-  };
-})(window.PolymerGestures);
-
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var pointermap = dispatcher.pointermap;
-  // radius around touchend that swallows mouse events
-  var DEDUP_DIST = 25;
-
-  var WHICH_TO_BUTTONS = [0, 1, 4, 2];
-
-  var currentButtons = 0;
-
-  var FIREFOX_LINUX = /Linux.*Firefox\//i;
-
-  var HAS_BUTTONS = (function() {
-    // firefox on linux returns spec-incorrect values for mouseup.buttons
-    // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent.buttons#See_also
-    // https://codereview.chromium.org/727593003/#msg16
-    if (FIREFOX_LINUX.test(navigator.userAgent)) {
-      return false;
-    }
-    try {
-      return new MouseEvent('test', {buttons: 1}).buttons === 1;
-    } catch (e) {
-      return false;
-    }
-  })();
-
-  // handler block for native mouse events
-  var mouseEvents = {
-    POINTER_ID: 1,
-    POINTER_TYPE: 'mouse',
-    events: [
-      'mousedown',
-      'mousemove',
-      'mouseup'
-    ],
-    exposes: [
-      'down',
-      'up',
-      'move'
-    ],
-    register: function(target) {
-      dispatcher.listen(target, this.events);
-    },
-    unregister: function(target) {
-      if (target.nodeType === Node.DOCUMENT_NODE) {
-        return;
-      }
-      dispatcher.unlisten(target, this.events);
-    },
-    lastTouches: [],
-    // collide with the global mouse listener
-    isEventSimulatedFromTouch: function(inEvent) {
-      var lts = this.lastTouches;
-      var x = inEvent.clientX, y = inEvent.clientY;
-      for (var i = 0, l = lts.length, t; i < l && (t = lts[i]); i++) {
-        // simulated mouse events will be swallowed near a primary touchend
-        var dx = Math.abs(x - t.x), dy = Math.abs(y - t.y);
-        if (dx <= DEDUP_DIST && dy <= DEDUP_DIST) {
-          return true;
-        }
-      }
-    },
-    prepareEvent: function(inEvent) {
-      var e = dispatcher.cloneEvent(inEvent);
-      e.pointerId = this.POINTER_ID;
-      e.isPrimary = true;
-      e.pointerType = this.POINTER_TYPE;
-      e._source = 'mouse';
-      if (!HAS_BUTTONS) {
-        var type = inEvent.type;
-        var bit = WHICH_TO_BUTTONS[inEvent.which] || 0;
-        if (type === 'mousedown') {
-          currentButtons |= bit;
-        } else if (type === 'mouseup') {
-          currentButtons &= ~bit;
-        }
-        e.buttons = currentButtons;
-      }
-      return e;
-    },
-    mousedown: function(inEvent) {
-      if (!this.isEventSimulatedFromTouch(inEvent)) {
-        var p = pointermap.has(this.POINTER_ID);
-        var e = this.prepareEvent(inEvent);
-        e.target = scope.findTarget(inEvent);
-        pointermap.set(this.POINTER_ID, e.target);
-        dispatcher.down(e);
-      }
-    },
-    mousemove: function(inEvent) {
-      if (!this.isEventSimulatedFromTouch(inEvent)) {
-        var target = pointermap.get(this.POINTER_ID);
-        if (target) {
-          var e = this.prepareEvent(inEvent);
-          e.target = target;
-          // handle case where we missed a mouseup
-          if ((HAS_BUTTONS ? e.buttons : e.which) === 0) {
-            if (!HAS_BUTTONS) {
-              currentButtons = e.buttons = 0;
-            }
-            dispatcher.cancel(e);
-            this.cleanupMouse(e.buttons);
-          } else {
-            dispatcher.move(e);
-          }
-        }
-      }
-    },
-    mouseup: function(inEvent) {
-      if (!this.isEventSimulatedFromTouch(inEvent)) {
-        var e = this.prepareEvent(inEvent);
-        e.relatedTarget = scope.findTarget(inEvent);
-        e.target = pointermap.get(this.POINTER_ID);
-        dispatcher.up(e);
-        this.cleanupMouse(e.buttons);
-      }
-    },
-    cleanupMouse: function(buttons) {
-      if (buttons === 0) {
-        pointermap.delete(this.POINTER_ID);
-      }
-    }
-  };
-
-  scope.mouseEvents = mouseEvents;
-})(window.PolymerGestures);
-
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var allShadows = scope.targetFinding.allShadows.bind(scope.targetFinding);
-  var pointermap = dispatcher.pointermap;
-  var touchMap = Array.prototype.map.call.bind(Array.prototype.map);
-  // This should be long enough to ignore compat mouse events made by touch
-  var DEDUP_TIMEOUT = 2500;
-  var DEDUP_DIST = 25;
-  var CLICK_COUNT_TIMEOUT = 200;
-  var HYSTERESIS = 20;
-  var ATTRIB = 'touch-action';
-  // TODO(dfreedm): disable until http://crbug.com/399765 is resolved
-  // var HAS_TOUCH_ACTION = ATTRIB in document.head.style;
-  var HAS_TOUCH_ACTION = false;
-
-  // handler block for native touch events
-  var touchEvents = {
-    IS_IOS: false,
-    events: [
-      'touchstart',
-      'touchmove',
-      'touchend',
-      'touchcancel'
-    ],
-    exposes: [
-      'down',
-      'up',
-      'move'
-    ],
-    register: function(target, initial) {
-      if (this.IS_IOS ? initial : !initial) {
-        dispatcher.listen(target, this.events);
-      }
-    },
-    unregister: function(target) {
-      if (!this.IS_IOS) {
-        dispatcher.unlisten(target, this.events);
-      }
-    },
-    scrollTypes: {
-      EMITTER: 'none',
-      XSCROLLER: 'pan-x',
-      YSCROLLER: 'pan-y',
-    },
-    touchActionToScrollType: function(touchAction) {
-      var t = touchAction;
-      var st = this.scrollTypes;
-      if (t === st.EMITTER) {
-        return 'none';
-      } else if (t === st.XSCROLLER) {
-        return 'X';
-      } else if (t === st.YSCROLLER) {
-        return 'Y';
-      } else {
-        return 'XY';
-      }
-    },
-    POINTER_TYPE: 'touch',
-    firstTouch: null,
-    isPrimaryTouch: function(inTouch) {
-      return this.firstTouch === inTouch.identifier;
-    },
-    setPrimaryTouch: function(inTouch) {
-      // set primary touch if there no pointers, or the only pointer is the mouse
-      if (pointermap.pointers() === 0 || (pointermap.pointers() === 1 && pointermap.has(1))) {
-        this.firstTouch = inTouch.identifier;
-        this.firstXY = {X: inTouch.clientX, Y: inTouch.clientY};
-        this.firstTarget = inTouch.target;
-        this.scrolling = null;
-        this.cancelResetClickCount();
-      }
-    },
-    removePrimaryPointer: function(inPointer) {
-      if (inPointer.isPrimary) {
-        this.firstTouch = null;
-        this.firstXY = null;
-        this.resetClickCount();
-      }
-    },
-    clickCount: 0,
-    resetId: null,
-    resetClickCount: function() {
-      var fn = function() {
-        this.clickCount = 0;
-        this.resetId = null;
-      }.bind(this);
-      this.resetId = setTimeout(fn, CLICK_COUNT_TIMEOUT);
-    },
-    cancelResetClickCount: function() {
-      if (this.resetId) {
-        clearTimeout(this.resetId);
-      }
-    },
-    typeToButtons: function(type) {
-      var ret = 0;
-      if (type === 'touchstart' || type === 'touchmove') {
-        ret = 1;
-      }
-      return ret;
-    },
-    findTarget: function(touch, id) {
-      if (this.currentTouchEvent.type === 'touchstart') {
-        if (this.isPrimaryTouch(touch)) {
-          var fastPath = {
-            clientX: touch.clientX,
-            clientY: touch.clientY,
-            path: this.currentTouchEvent.path,
-            target: this.currentTouchEvent.target
-          };
-          return scope.findTarget(fastPath);
-        } else {
-          return scope.findTarget(touch);
-        }
-      }
-      // reuse target we found in touchstart
-      return pointermap.get(id);
-    },
-    touchToPointer: function(inTouch) {
-      var cte = this.currentTouchEvent;
-      var e = dispatcher.cloneEvent(inTouch);
-      // Spec specifies that pointerId 1 is reserved for Mouse.
-      // Touch identifiers can start at 0.
-      // Add 2 to the touch identifier for compatibility.
-      var id = e.pointerId = inTouch.identifier + 2;
-      e.target = this.findTarget(inTouch, id);
-      e.bubbles = true;
-      e.cancelable = true;
-      e.detail = this.clickCount;
-      e.buttons = this.typeToButtons(cte.type);
-      e.width = inTouch.webkitRadiusX || inTouch.radiusX || 0;
-      e.height = inTouch.webkitRadiusY || inTouch.radiusY || 0;
-      e.pressure = inTouch.webkitForce || inTouch.force || 0.5;
-      e.isPrimary = this.isPrimaryTouch(inTouch);
-      e.pointerType = this.POINTER_TYPE;
-      e._source = 'touch';
-      // forward touch preventDefaults
-      var self = this;
-      e.preventDefault = function() {
-        self.scrolling = false;
-        self.firstXY = null;
-        cte.preventDefault();
-      };
-      return e;
-    },
-    processTouches: function(inEvent, inFunction) {
-      var tl = inEvent.changedTouches;
-      this.currentTouchEvent = inEvent;
-      for (var i = 0, t, p; i < tl.length; i++) {
-        t = tl[i];
-        p = this.touchToPointer(t);
-        if (inEvent.type === 'touchstart') {
-          pointermap.set(p.pointerId, p.target);
-        }
-        if (pointermap.has(p.pointerId)) {
-          inFunction.call(this, p);
-        }
-        if (inEvent.type === 'touchend' || inEvent._cancel) {
-          this.cleanUpPointer(p);
-        }
-      }
-    },
-    // For single axis scrollers, determines whether the element should emit
-    // pointer events or behave as a scroller
-    shouldScroll: function(inEvent) {
-      if (this.firstXY) {
-        var ret;
-        var touchAction = scope.targetFinding.findTouchAction(inEvent);
-        var scrollAxis = this.touchActionToScrollType(touchAction);
-        if (scrollAxis === 'none') {
-          // this element is a touch-action: none, should never scroll
-          ret = false;
-        } else if (scrollAxis === 'XY') {
-          // this element should always scroll
-          ret = true;
-        } else {
-          var t = inEvent.changedTouches[0];
-          // check the intended scroll axis, and other axis
-          var a = scrollAxis;
-          var oa = scrollAxis === 'Y' ? 'X' : 'Y';
-          var da = Math.abs(t['client' + a] - this.firstXY[a]);
-          var doa = Math.abs(t['client' + oa] - this.firstXY[oa]);
-          // if delta in the scroll axis > delta other axis, scroll instead of
-          // making events
-          ret = da >= doa;
-        }
-        return ret;
-      }
-    },
-    findTouch: function(inTL, inId) {
-      for (var i = 0, l = inTL.length, t; i < l && (t = inTL[i]); i++) {
-        if (t.identifier === inId) {
-          return true;
-        }
-      }
-    },
-    // In some instances, a touchstart can happen without a touchend. This
-    // leaves the pointermap in a broken state.
-    // Therefore, on every touchstart, we remove the touches that did not fire a
-    // touchend event.
-    // To keep state globally consistent, we fire a
-    // pointercancel for this "abandoned" touch
-    vacuumTouches: function(inEvent) {
-      var tl = inEvent.touches;
-      // pointermap.pointers() should be < tl.length here, as the touchstart has not
-      // been processed yet.
-      if (pointermap.pointers() >= tl.length) {
-        var d = [];
-        pointermap.forEach(function(value, key) {
-          // Never remove pointerId == 1, which is mouse.
-          // Touch identifiers are 2 smaller than their pointerId, which is the
-          // index in pointermap.
-          if (key !== 1 && !this.findTouch(tl, key - 2)) {
-            var p = value;
-            d.push(p);
-          }
-        }, this);
-        d.forEach(function(p) {
-          this.cancel(p);
-          pointermap.delete(p.pointerId);
-        }, this);
-      }
-    },
-    touchstart: function(inEvent) {
-      this.vacuumTouches(inEvent);
-      this.setPrimaryTouch(inEvent.changedTouches[0]);
-      this.dedupSynthMouse(inEvent);
-      if (!this.scrolling) {
-        this.clickCount++;
-        this.processTouches(inEvent, this.down);
-      }
-    },
-    down: function(inPointer) {
-      dispatcher.down(inPointer);
-    },
-    touchmove: function(inEvent) {
-      if (HAS_TOUCH_ACTION) {
-        // touchevent.cancelable == false is sent when the page is scrolling under native Touch Action in Chrome 36
-        // https://groups.google.com/a/chromium.org/d/msg/input-dev/wHnyukcYBcA/b9kmtwM1jJQJ
-        if (inEvent.cancelable) {
-          this.processTouches(inEvent, this.move);
-        }
-      } else {
-        if (!this.scrolling) {
-          if (this.scrolling === null && this.shouldScroll(inEvent)) {
-            this.scrolling = true;
-          } else {
-            this.scrolling = false;
-            inEvent.preventDefault();
-            this.processTouches(inEvent, this.move);
-          }
-        } else if (this.firstXY) {
-          var t = inEvent.changedTouches[0];
-          var dx = t.clientX - this.firstXY.X;
-          var dy = t.clientY - this.firstXY.Y;
-          var dd = Math.sqrt(dx * dx + dy * dy);
-          if (dd >= HYSTERESIS) {
-            this.touchcancel(inEvent);
-            this.scrolling = true;
-            this.firstXY = null;
-          }
-        }
-      }
-    },
-    move: function(inPointer) {
-      dispatcher.move(inPointer);
-    },
-    touchend: function(inEvent) {
-      this.dedupSynthMouse(inEvent);
-      this.processTouches(inEvent, this.up);
-    },
-    up: function(inPointer) {
-      inPointer.relatedTarget = scope.findTarget(inPointer);
-      dispatcher.up(inPointer);
-    },
-    cancel: function(inPointer) {
-      dispatcher.cancel(inPointer);
-    },
-    touchcancel: function(inEvent) {
-      inEvent._cancel = true;
-      this.processTouches(inEvent, this.cancel);
-    },
-    cleanUpPointer: function(inPointer) {
-      pointermap['delete'](inPointer.pointerId);
-      this.removePrimaryPointer(inPointer);
-    },
-    // prevent synth mouse events from creating pointer events
-    dedupSynthMouse: function(inEvent) {
-      var lts = scope.mouseEvents.lastTouches;
-      var t = inEvent.changedTouches[0];
-      // only the primary finger will synth mouse events
-      if (this.isPrimaryTouch(t)) {
-        // remember x/y of last touch
-        var lt = {x: t.clientX, y: t.clientY};
-        lts.push(lt);
-        var fn = (function(lts, lt){
-          var i = lts.indexOf(lt);
-          if (i > -1) {
-            lts.splice(i, 1);
-          }
-        }).bind(null, lts, lt);
-        setTimeout(fn, DEDUP_TIMEOUT);
-      }
-    }
-  };
-
-  // prevent "ghost clicks" that come from elements that were removed in a touch handler
-  var STOP_PROP_FN = Event.prototype.stopImmediatePropagation || Event.prototype.stopPropagation;
-  document.addEventListener('click', function(ev) {
-    var x = ev.clientX, y = ev.clientY;
-    // check if a click is within DEDUP_DIST px radius of the touchstart
-    var closeTo = function(touch) {
-      var dx = Math.abs(x - touch.x), dy = Math.abs(y - touch.y);
-      return (dx <= DEDUP_DIST && dy <= DEDUP_DIST);
-    };
-    // if click coordinates are close to touch coordinates, assume the click came from a touch
-    var wasTouched = scope.mouseEvents.lastTouches.some(closeTo);
-    // if the click came from touch, and the touchstart target is not in the path of the click event,
-    // then the touchstart target was probably removed, and the click should be "busted"
-    var path = scope.targetFinding.path(ev);
-    if (wasTouched) {
-      for (var i = 0; i < path.length; i++) {
-        if (path[i] === touchEvents.firstTarget) {
-          return;
-        }
-      }
-      ev.preventDefault();
-      STOP_PROP_FN.call(ev);
-    }
-  }, true);
-
-  scope.touchEvents = touchEvents;
-})(window.PolymerGestures);
-
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var pointermap = dispatcher.pointermap;
-  var HAS_BITMAP_TYPE = window.MSPointerEvent && typeof window.MSPointerEvent.MSPOINTER_TYPE_MOUSE === 'number';
-  var msEvents = {
-    events: [
-      'MSPointerDown',
-      'MSPointerMove',
-      'MSPointerUp',
-      'MSPointerCancel',
-    ],
-    register: function(target) {
-      dispatcher.listen(target, this.events);
-    },
-    unregister: function(target) {
-      if (target.nodeType === Node.DOCUMENT_NODE) {
-        return;
-      }
-      dispatcher.unlisten(target, this.events);
-    },
-    POINTER_TYPES: [
-      '',
-      'unavailable',
-      'touch',
-      'pen',
-      'mouse'
-    ],
-    prepareEvent: function(inEvent) {
-      var e = inEvent;
-      e = dispatcher.cloneEvent(inEvent);
-      if (HAS_BITMAP_TYPE) {
-        e.pointerType = this.POINTER_TYPES[inEvent.pointerType];
-      }
-      e._source = 'ms';
-      return e;
-    },
-    cleanup: function(id) {
-      pointermap['delete'](id);
-    },
-    MSPointerDown: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.target = scope.findTarget(inEvent);
-      pointermap.set(inEvent.pointerId, e.target);
-      dispatcher.down(e);
-    },
-    MSPointerMove: function(inEvent) {
-      var target = pointermap.get(inEvent.pointerId);
-      if (target) {
-        var e = this.prepareEvent(inEvent);
-        e.target = target;
-        dispatcher.move(e);
-      }
-    },
-    MSPointerUp: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.relatedTarget = scope.findTarget(inEvent);
-      e.target = pointermap.get(e.pointerId);
-      dispatcher.up(e);
-      this.cleanup(inEvent.pointerId);
-    },
-    MSPointerCancel: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.relatedTarget = scope.findTarget(inEvent);
-      e.target = pointermap.get(e.pointerId);
-      dispatcher.cancel(e);
-      this.cleanup(inEvent.pointerId);
-    }
-  };
-
-  scope.msEvents = msEvents;
-})(window.PolymerGestures);
-
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var pointermap = dispatcher.pointermap;
-  var pointerEvents = {
-    events: [
-      'pointerdown',
-      'pointermove',
-      'pointerup',
-      'pointercancel'
-    ],
-    prepareEvent: function(inEvent) {
-      var e = dispatcher.cloneEvent(inEvent);
-      e._source = 'pointer';
-      return e;
-    },
-    register: function(target) {
-      dispatcher.listen(target, this.events);
-    },
-    unregister: function(target) {
-      if (target.nodeType === Node.DOCUMENT_NODE) {
-        return;
-      }
-      dispatcher.unlisten(target, this.events);
-    },
-    cleanup: function(id) {
-      pointermap['delete'](id);
-    },
-    pointerdown: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.target = scope.findTarget(inEvent);
-      pointermap.set(e.pointerId, e.target);
-      dispatcher.down(e);
-    },
-    pointermove: function(inEvent) {
-      var target = pointermap.get(inEvent.pointerId);
-      if (target) {
-        var e = this.prepareEvent(inEvent);
-        e.target = target;
-        dispatcher.move(e);
-      }
-    },
-    pointerup: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.relatedTarget = scope.findTarget(inEvent);
-      e.target = pointermap.get(e.pointerId);
-      dispatcher.up(e);
-      this.cleanup(inEvent.pointerId);
-    },
-    pointercancel: function(inEvent) {
-      var e = this.prepareEvent(inEvent);
-      e.relatedTarget = scope.findTarget(inEvent);
-      e.target = pointermap.get(e.pointerId);
-      dispatcher.cancel(e);
-      this.cleanup(inEvent.pointerId);
-    }
-  };
-
-  scope.pointerEvents = pointerEvents;
-})(window.PolymerGestures);
-
-/**
- * This module contains the handlers for native platform events.
- * From here, the dispatcher is called to create unified pointer events.
- * Included are touch events (v1), mouse events, and MSPointerEvents.
- */
-(function(scope) {
-
-  var dispatcher = scope.dispatcher;
-  var nav = window.navigator;
-
-  if (window.PointerEvent) {
-    dispatcher.registerSource('pointer', scope.pointerEvents);
-  } else if (nav.msPointerEnabled) {
-    dispatcher.registerSource('ms', scope.msEvents);
-  } else {
-    dispatcher.registerSource('mouse', scope.mouseEvents);
-    if (window.ontouchstart !== undefined) {
-      dispatcher.registerSource('touch', scope.touchEvents);
-    }
-  }
-
-  // Work around iOS bugs https://bugs.webkit.org/show_bug.cgi?id=135628 and https://bugs.webkit.org/show_bug.cgi?id=136506
-  var ua = navigator.userAgent;
-  var IS_IOS = ua.match(/iPad|iPhone|iPod/) && 'ontouchstart' in window;
-
-  dispatcher.IS_IOS = IS_IOS;
-  scope.touchEvents.IS_IOS = IS_IOS;
-
-  dispatcher.register(document, true);
-})(window.PolymerGestures);
-
-/**
- * This event denotes the beginning of a series of tracking events.
- *
- * @module PointerGestures
- * @submodule Events
- * @class trackstart
- */
-/**
- * Pixels moved in the x direction since trackstart.
- * @type Number
- * @property dx
- */
-/**
- * Pixes moved in the y direction since trackstart.
- * @type Number
- * @property dy
- */
-/**
- * Pixels moved in the x direction since the last track.
- * @type Number
- * @property ddx
- */
-/**
- * Pixles moved in the y direction since the last track.
- * @type Number
- * @property ddy
- */
-/**
- * The clientX position of the track gesture.
- * @type Number
- * @property clientX
- */
-/**
- * The clientY position of the track gesture.
- * @type Number
- * @property clientY
- */
-/**
- * The pageX position of the track gesture.
- * @type Number
- * @property pageX
- */
-/**
- * The pageY position of the track gesture.
- * @type Number
- * @property pageY
- */
-/**
- * The screenX position of the track gesture.
- * @type Number
- * @property screenX
- */
-/**
- * The screenY position of the track gesture.
- * @type Number
- * @property screenY
- */
-/**
- * The last x axis direction of the pointer.
- * @type Number
- * @property xDirection
- */
-/**
- * The last y axis direction of the pointer.
- * @type Number
- * @property yDirection
- */
-/**
- * A shared object between all tracking events.
- * @type Object
- * @property trackInfo
- */
-/**
- * The element currently under the pointer.
- * @type Element
- * @property relatedTarget
- */
-/**
- * The type of pointer that make the track gesture.
- * @type String
- * @property pointerType
- */
-/**
- *
- * This event fires for all pointer movement being tracked.
- *
- * @class track
- * @extends trackstart
- */
-/**
- * This event fires when the pointer is no longer being tracked.
- *
- * @class trackend
- * @extends trackstart
- */
-
- (function(scope) {
-   var dispatcher = scope.dispatcher;
-   var eventFactory = scope.eventFactory;
-   var pointermap = new scope.PointerMap();
-   var track = {
-     events: [
-       'down',
-       'move',
-       'up',
-     ],
-     exposes: [
-      'trackstart',
-      'track',
-      'trackx',
-      'tracky',
-      'trackend'
-     ],
-     defaultActions: {
-       'track': 'none',
-       'trackx': 'pan-y',
-       'tracky': 'pan-x'
-     },
-     WIGGLE_THRESHOLD: 4,
-     clampDir: function(inDelta) {
-       return inDelta > 0 ? 1 : -1;
-     },
-     calcPositionDelta: function(inA, inB) {
-       var x = 0, y = 0;
-       if (inA && inB) {
-         x = inB.pageX - inA.pageX;
-         y = inB.pageY - inA.pageY;
-       }
-       return {x: x, y: y};
-     },
-     fireTrack: function(inType, inEvent, inTrackingData) {
-       var t = inTrackingData;
-       var d = this.calcPositionDelta(t.downEvent, inEvent);
-       var dd = this.calcPositionDelta(t.lastMoveEvent, inEvent);
-       if (dd.x) {
-         t.xDirection = this.clampDir(dd.x);
-       } else if (inType === 'trackx') {
-         return;
-       }
-       if (dd.y) {
-         t.yDirection = this.clampDir(dd.y);
-       } else if (inType === 'tracky') {
-         return;
-       }
-       var gestureProto = {
-         bubbles: true,
-         cancelable: true,
-         trackInfo: t.trackInfo,
-         relatedTarget: inEvent.relatedTarget,
-         pointerType: inEvent.pointerType,
-         pointerId: inEvent.pointerId,
-         _source: 'track'
-       };
-       if (inType !== 'tracky') {
-         gestureProto.x = inEvent.x;
-         gestureProto.dx = d.x;
-         gestureProto.ddx = dd.x;
-         gestureProto.clientX = inEvent.clientX;
-         gestureProto.pageX = inEvent.pageX;
-         gestureProto.screenX = inEvent.screenX;
-         gestureProto.xDirection = t.xDirection;
-       }
-       if (inType !== 'trackx') {
-         gestureProto.dy = d.y;
-         gestureProto.ddy = dd.y;
-         gestureProto.y = inEvent.y;
-         gestureProto.clientY = inEvent.clientY;
-         gestureProto.pageY = inEvent.pageY;
-         gestureProto.screenY = inEvent.screenY;
-         gestureProto.yDirection = t.yDirection;
-       }
-       var e = eventFactory.makeGestureEvent(inType, gestureProto);
-       t.downTarget.dispatchEvent(e);
-     },
-     down: function(inEvent) {
-       if (inEvent.isPrimary && (inEvent.pointerType === 'mouse' ? inEvent.buttons === 1 : true)) {
-         var p = {
-           downEvent: inEvent,
-           downTarget: inEvent.target,
-           trackInfo: {},
-           lastMoveEvent: null,
-           xDirection: 0,
-           yDirection: 0,
-           tracking: false
-         };
-         pointermap.set(inEvent.pointerId, p);
-       }
-     },
-     move: function(inEvent) {
-       var p = pointermap.get(inEvent.pointerId);
-       if (p) {
-         if (!p.tracking) {
-           var d = this.calcPositionDelta(p.downEvent, inEvent);
-           var move = d.x * d.x + d.y * d.y;
-           // start tracking only if finger moves more than WIGGLE_THRESHOLD
-           if (move > this.WIGGLE_THRESHOLD) {
-             p.tracking = true;
-             p.lastMoveEvent = p.downEvent;
-             this.fireTrack('trackstart', inEvent, p);
-           }
-         }
-         if (p.tracking) {
-           this.fireTrack('track', inEvent, p);
-           this.fireTrack('trackx', inEvent, p);
-           this.fireTrack('tracky', inEvent, p);
-         }
-         p.lastMoveEvent = inEvent;
-       }
-     },
-     up: function(inEvent) {
-       var p = pointermap.get(inEvent.pointerId);
-       if (p) {
-         if (p.tracking) {
-           this.fireTrack('trackend', inEvent, p);
-         }
-         pointermap.delete(inEvent.pointerId);
-       }
-     }
-   };
-   dispatcher.registerGesture('track', track);
- })(window.PolymerGestures);
-
-/**
- * This event is fired when a pointer is held down for 200ms.
- *
- * @module PointerGestures
- * @submodule Events
- * @class hold
- */
-/**
- * Type of pointer that made the holding event.
- * @type String
- * @property pointerType
- */
-/**
- * Screen X axis position of the held pointer
- * @type Number
- * @property clientX
- */
-/**
- * Screen Y axis position of the held pointer
- * @type Number
- * @property clientY
- */
-/**
- * Type of pointer that made the holding event.
- * @type String
- * @property pointerType
- */
-/**
- * This event is fired every 200ms while a pointer is held down.
- *
- * @class holdpulse
- * @extends hold
- */
-/**
- * Milliseconds pointer has been held down.
- * @type Number
- * @property holdTime
- */
-/**
- * This event is fired when a held pointer is released or moved.
- *
- * @class release
- */
-
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var eventFactory = scope.eventFactory;
-  var hold = {
-    // wait at least HOLD_DELAY ms between hold and pulse events
-    HOLD_DELAY: 200,
-    // pointer can move WIGGLE_THRESHOLD pixels before not counting as a hold
-    WIGGLE_THRESHOLD: 16,
-    events: [
-      'down',
-      'move',
-      'up',
-    ],
-    exposes: [
-      'hold',
-      'holdpulse',
-      'release'
-    ],
-    heldPointer: null,
-    holdJob: null,
-    pulse: function() {
-      var hold = Date.now() - this.heldPointer.timeStamp;
-      var type = this.held ? 'holdpulse' : 'hold';
-      this.fireHold(type, hold);
-      this.held = true;
-    },
-    cancel: function() {
-      clearInterval(this.holdJob);
-      if (this.held) {
-        this.fireHold('release');
-      }
-      this.held = false;
-      this.heldPointer = null;
-      this.target = null;
-      this.holdJob = null;
-    },
-    down: function(inEvent) {
-      if (inEvent.isPrimary && !this.heldPointer) {
-        this.heldPointer = inEvent;
-        this.target = inEvent.target;
-        this.holdJob = setInterval(this.pulse.bind(this), this.HOLD_DELAY);
-      }
-    },
-    up: function(inEvent) {
-      if (this.heldPointer && this.heldPointer.pointerId === inEvent.pointerId) {
-        this.cancel();
-      }
-    },
-    move: function(inEvent) {
-      if (this.heldPointer && this.heldPointer.pointerId === inEvent.pointerId) {
-        var x = inEvent.clientX - this.heldPointer.clientX;
-        var y = inEvent.clientY - this.heldPointer.clientY;
-        if ((x * x + y * y) > this.WIGGLE_THRESHOLD) {
-          this.cancel();
-        }
-      }
-    },
-    fireHold: function(inType, inHoldTime) {
-      var p = {
-        bubbles: true,
-        cancelable: true,
-        pointerType: this.heldPointer.pointerType,
-        pointerId: this.heldPointer.pointerId,
-        x: this.heldPointer.clientX,
-        y: this.heldPointer.clientY,
-        _source: 'hold'
-      };
-      if (inHoldTime) {
-        p.holdTime = inHoldTime;
-      }
-      var e = eventFactory.makeGestureEvent(inType, p);
-      this.target.dispatchEvent(e);
-    }
-  };
-  dispatcher.registerGesture('hold', hold);
-})(window.PolymerGestures);
-
-/**
- * This event is fired when a pointer quickly goes down and up, and is used to
- * denote activation.
- *
- * Any gesture event can prevent the tap event from being created by calling
- * `event.preventTap`.
- *
- * Any pointer event can prevent the tap by setting the `tapPrevented` property
- * on itself.
- *
- * @module PointerGestures
- * @submodule Events
- * @class tap
- */
-/**
- * X axis position of the tap.
- * @property x
- * @type Number
- */
-/**
- * Y axis position of the tap.
- * @property y
- * @type Number
- */
-/**
- * Type of the pointer that made the tap.
- * @property pointerType
- * @type String
- */
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var eventFactory = scope.eventFactory;
-  var pointermap = new scope.PointerMap();
-  var tap = {
-    events: [
-      'down',
-      'up'
-    ],
-    exposes: [
-      'tap'
-    ],
-    down: function(inEvent) {
-      if (inEvent.isPrimary && !inEvent.tapPrevented) {
-        pointermap.set(inEvent.pointerId, {
-          target: inEvent.target,
-          buttons: inEvent.buttons,
-          x: inEvent.clientX,
-          y: inEvent.clientY
-        });
-      }
-    },
-    shouldTap: function(e, downState) {
-      var tap = true;
-      if (e.pointerType === 'mouse') {
-        // only allow left click to tap for mouse
-        tap = (e.buttons ^ 1) && (downState.buttons & 1);
-      }
-      return tap && !e.tapPrevented;
-    },
-    up: function(inEvent) {
-      var start = pointermap.get(inEvent.pointerId);
-      if (start && this.shouldTap(inEvent, start)) {
-        // up.relatedTarget is target currently under finger
-        var t = scope.targetFinding.LCA(start.target, inEvent.relatedTarget);
-        if (t) {
-          var e = eventFactory.makeGestureEvent('tap', {
-            bubbles: true,
-            cancelable: true,
-            x: inEvent.clientX,
-            y: inEvent.clientY,
-            detail: inEvent.detail,
-            pointerType: inEvent.pointerType,
-            pointerId: inEvent.pointerId,
-            altKey: inEvent.altKey,
-            ctrlKey: inEvent.ctrlKey,
-            metaKey: inEvent.metaKey,
-            shiftKey: inEvent.shiftKey,
-            _source: 'tap'
-          });
-          t.dispatchEvent(e);
-        }
-      }
-      pointermap.delete(inEvent.pointerId);
-    }
-  };
-  // patch eventFactory to remove id from tap's pointermap for preventTap calls
-  eventFactory.preventTap = function(e) {
-    return function() {
-      e.tapPrevented = true;
-      pointermap.delete(e.pointerId);
-    };
-  };
-  dispatcher.registerGesture('tap', tap);
-})(window.PolymerGestures);
-
-/*
- * Basic strategy: find the farthest apart points, use as diameter of circle
- * react to size change and rotation of the chord
- */
-
-/**
- * @module pointer-gestures
- * @submodule Events
- * @class pinch
- */
-/**
- * Scale of the pinch zoom gesture
- * @property scale
- * @type Number
- */
-/**
- * Center X position of pointers causing pinch
- * @property centerX
- * @type Number
- */
-/**
- * Center Y position of pointers causing pinch
- * @property centerY
- * @type Number
- */
-
-/**
- * @module pointer-gestures
- * @submodule Events
- * @class rotate
- */
-/**
- * Angle (in degrees) of rotation. Measured from starting positions of pointers.
- * @property angle
- * @type Number
- */
-/**
- * Center X position of pointers causing rotation
- * @property centerX
- * @type Number
- */
-/**
- * Center Y position of pointers causing rotation
- * @property centerY
- * @type Number
- */
-(function(scope) {
-  var dispatcher = scope.dispatcher;
-  var eventFactory = scope.eventFactory;
-  var pointermap = new scope.PointerMap();
-  var RAD_TO_DEG = 180 / Math.PI;
-  var pinch = {
-    events: [
-      'down',
-      'up',
-      'move',
-      'cancel'
-    ],
-    exposes: [
-      'pinchstart',
-      'pinch',
-      'pinchend',
-      'rotate'
-    ],
-    defaultActions: {
-      'pinch': 'none',
-      'rotate': 'none'
-    },
-    reference: {},
-    down: function(inEvent) {
-      pointermap.set(inEvent.pointerId, inEvent);
-      if (pointermap.pointers() == 2) {
-        var points = this.calcChord();
-        var angle = this.calcAngle(points);
-        this.reference = {
-          angle: angle,
-          diameter: points.diameter,
-          target: scope.targetFinding.LCA(points.a.target, points.b.target)
-        };
-
-        this.firePinch('pinchstart', points.diameter, points);
-      }
-    },
-    up: function(inEvent) {
-      var p = pointermap.get(inEvent.pointerId);
-      var num = pointermap.pointers();
-      if (p) {
-        if (num === 2) {
-          // fire 'pinchend' before deleting pointer
-          var points = this.calcChord();
-          this.firePinch('pinchend', points.diameter, points);
-        }
-        pointermap.delete(inEvent.pointerId);
-      }
-    },
-    move: function(inEvent) {
-      if (pointermap.has(inEvent.pointerId)) {
-        pointermap.set(inEvent.pointerId, inEvent);
-        if (pointermap.pointers() > 1) {
-          this.calcPinchRotate();
-        }
-      }
-    },
-    cancel: function(inEvent) {
-        this.up(inEvent);
-    },
-    firePinch: function(type, diameter, points) {
-      var zoom = diameter / this.reference.diameter;
-      var e = eventFactory.makeGestureEvent(type, {
-        bubbles: true,
-        cancelable: true,
-        scale: zoom,
-        centerX: points.center.x,
-        centerY: points.center.y,
-        _source: 'pinch'
-      });
-      this.reference.target.dispatchEvent(e);
-    },
-    fireRotate: function(angle, points) {
-      var diff = Math.round((angle - this.reference.angle) % 360);
-      var e = eventFactory.makeGestureEvent('rotate', {
-        bubbles: true,
-        cancelable: true,
-        angle: diff,
-        centerX: points.center.x,
-        centerY: points.center.y,
-        _source: 'pinch'
-      });
-      this.reference.target.dispatchEvent(e);
-    },
-    calcPinchRotate: function() {
-      var points = this.calcChord();
-      var diameter = points.diameter;
-      var angle = this.calcAngle(points);
-      if (diameter != this.reference.diameter) {
-        this.firePinch('pinch', diameter, points);
-      }
-      if (angle != this.reference.angle) {
-        this.fireRotate(angle, points);
-      }
-    },
-    calcChord: function() {
-      var pointers = [];
-      pointermap.forEach(function(p) {
-        pointers.push(p);
-      });
-      var dist = 0;
-      // start with at least two pointers
-      var points = {a: pointers[0], b: pointers[1]};
-      var x, y, d;
-      for (var i = 0; i < pointers.length; i++) {
-        var a = pointers[i];
-        for (var j = i + 1; j < pointers.length; j++) {
-          var b = pointers[j];
-          x = Math.abs(a.clientX - b.clientX);
-          y = Math.abs(a.clientY - b.clientY);
-          d = x + y;
-          if (d > dist) {
-            dist = d;
-            points = {a: a, b: b};
-          }
-        }
-      }
-      x = Math.abs(points.a.clientX + points.b.clientX) / 2;
-      y = Math.abs(points.a.clientY + points.b.clientY) / 2;
-      points.center = { x: x, y: y };
-      points.diameter = dist;
-      return points;
-    },
-    calcAngle: function(points) {
-      var x = points.a.clientX - points.b.clientX;
-      var y = points.a.clientY - points.b.clientY;
-      return (360 + Math.atan2(y, x) * RAD_TO_DEG) % 360;
-    }
-  };
-  dispatcher.registerGesture('pinch', pinch);
-})(window.PolymerGestures);
-
-(function (global) {
-    'use strict';
-
-    var Token,
-        TokenName,
-        Syntax,
-        Messages,
-        source,
-        index,
-        length,
-        delegate,
-        lookahead,
-        state;
-
-    Token = {
-        BooleanLiteral: 1,
-        EOF: 2,
-        Identifier: 3,
-        Keyword: 4,
-        NullLiteral: 5,
-        NumericLiteral: 6,
-        Punctuator: 7,
-        StringLiteral: 8
-    };
-
-    TokenName = {};
-    TokenName[Token.BooleanLiteral] = 'Boolean';
-    TokenName[Token.EOF] = '<end>';
-    TokenName[Token.Identifier] = 'Identifier';
-    TokenName[Token.Keyword] = 'Keyword';
-    TokenName[Token.NullLiteral] = 'Null';
-    TokenName[Token.NumericLiteral] = 'Numeric';
-    TokenName[Token.Punctuator] = 'Punctuator';
-    TokenName[Token.StringLiteral] = 'String';
-
-    Syntax = {
-        ArrayExpression: 'ArrayExpression',
-        BinaryExpression: 'BinaryExpression',
-        CallExpression: 'CallExpression',
-        ConditionalExpression: 'ConditionalExpression',
-        EmptyStatement: 'EmptyStatement',
-        ExpressionStatement: 'ExpressionStatement',
-        Identifier: 'Identifier',
-        Literal: 'Literal',
-        LabeledStatement: 'LabeledStatement',
-        LogicalExpression: 'LogicalExpression',
-        MemberExpression: 'MemberExpression',
-        ObjectExpression: 'ObjectExpression',
-        Program: 'Program',
-        Property: 'Property',
-        ThisExpression: 'ThisExpression',
-        UnaryExpression: 'UnaryExpression'
-    };
-
-    // Error messages should be identical to V8.
-    Messages = {
-        UnexpectedToken:  'Unexpected token %0',
-        UnknownLabel: 'Undefined label \'%0\'',
-        Redeclaration: '%0 \'%1\' has already been declared'
-    };
-
-    // Ensure the condition is true, otherwise throw an error.
-    // This is only to have a better contract semantic, i.e. another safety net
-    // to catch a logic error. The condition shall be fulfilled in normal case.
-    // Do NOT use this to enforce a certain condition on any user input.
-
-    function assert(condition, message) {
-        if (!condition) {
-            throw new Error('ASSERT: ' + message);
-        }
-    }
-
-    function isDecimalDigit(ch) {
-        return (ch >= 48 && ch <= 57);   // 0..9
-    }
-
-
-    // 7.2 White Space
-
-    function isWhiteSpace(ch) {
-        return (ch === 32) ||  // space
-            (ch === 9) ||      // tab
-            (ch === 0xB) ||
-            (ch === 0xC) ||
-            (ch === 0xA0) ||
-            (ch >= 0x1680 && '\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(String.fromCharCode(ch)) > 0);
-    }
-
-    // 7.3 Line Terminators
-
-    function isLineTerminator(ch) {
-        return (ch === 10) || (ch === 13) || (ch === 0x2028) || (ch === 0x2029);
-    }
-
-    // 7.6 Identifier Names and Identifiers
-
-    function isIdentifierStart(ch) {
-        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
-            (ch >= 65 && ch <= 90) ||         // A..Z
-            (ch >= 97 && ch <= 122);          // a..z
-    }
-
-    function isIdentifierPart(ch) {
-        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
-            (ch >= 65 && ch <= 90) ||         // A..Z
-            (ch >= 97 && ch <= 122) ||        // a..z
-            (ch >= 48 && ch <= 57);           // 0..9
-    }
-
-    // 7.6.1.1 Keywords
-
-    function isKeyword(id) {
-        return (id === 'this')
-    }
-
-    // 7.4 Comments
-
-    function skipWhitespace() {
-        while (index < length && isWhiteSpace(source.charCodeAt(index))) {
-           ++index;
-        }
-    }
-
-    function getIdentifier() {
-        var start, ch;
-
-        start = index++;
-        while (index < length) {
-            ch = source.charCodeAt(index);
-            if (isIdentifierPart(ch)) {
-                ++index;
-            } else {
-                break;
-            }
-        }
-
-        return source.slice(start, index);
-    }
-
-    function scanIdentifier() {
-        var start, id, type;
-
-        start = index;
-
-        id = getIdentifier();
-
-        // There is no keyword or literal with only one character.
-        // Thus, it must be an identifier.
-        if (id.length === 1) {
-            type = Token.Identifier;
-        } else if (isKeyword(id)) {
-            type = Token.Keyword;
-        } else if (id === 'null') {
-            type = Token.NullLiteral;
-        } else if (id === 'true' || id === 'false') {
-            type = Token.BooleanLiteral;
-        } else {
-            type = Token.Identifier;
-        }
-
-        return {
-            type: type,
-            value: id,
-            range: [start, index]
-        };
-    }
-
-
-    // 7.7 Punctuators
-
-    function scanPunctuator() {
-        var start = index,
-            code = source.charCodeAt(index),
-            code2,
-            ch1 = source[index],
-            ch2;
-
-        switch (code) {
-
-        // Check for most common single-character punctuators.
-        case 46:   // . dot
-        case 40:   // ( open bracket
-        case 41:   // ) close bracket
-        case 59:   // ; semicolon
-        case 44:   // , comma
-        case 123:  // { open curly brace
-        case 125:  // } close curly brace
-        case 91:   // [
-        case 93:   // ]
-        case 58:   // :
-        case 63:   // ?
-            ++index;
-            return {
-                type: Token.Punctuator,
-                value: String.fromCharCode(code),
-                range: [start, index]
-            };
-
-        default:
-            code2 = source.charCodeAt(index + 1);
-
-            // '=' (char #61) marks an assignment or comparison operator.
-            if (code2 === 61) {
-                switch (code) {
-                case 37:  // %
-                case 38:  // &
-                case 42:  // *:
-                case 43:  // +
-                case 45:  // -
-                case 47:  // /
-                case 60:  // <
-                case 62:  // >
-                case 124: // |
-                    index += 2;
-                    return {
-                        type: Token.Punctuator,
-                        value: String.fromCharCode(code) + String.fromCharCode(code2),
-                        range: [start, index]
-                    };
-
-                case 33: // !
-                case 61: // =
-                    index += 2;
-
-                    // !== and ===
-                    if (source.charCodeAt(index) === 61) {
-                        ++index;
-                    }
-                    return {
-                        type: Token.Punctuator,
-                        value: source.slice(start, index),
-                        range: [start, index]
-                    };
-                default:
-                    break;
-                }
-            }
-            break;
-        }
-
-        // Peek more characters.
-
-        ch2 = source[index + 1];
-
-        // Other 2-character punctuators: && ||
-
-        if (ch1 === ch2 && ('&|'.indexOf(ch1) >= 0)) {
-            index += 2;
-            return {
-                type: Token.Punctuator,
-                value: ch1 + ch2,
-                range: [start, index]
-            };
-        }
-
-        if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {
-            ++index;
-            return {
-                type: Token.Punctuator,
-                value: ch1,
-                range: [start, index]
-            };
-        }
-
-        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-    }
-
-    // 7.8.3 Numeric Literals
-    function scanNumericLiteral() {
-        var number, start, ch;
-
-        ch = source[index];
-        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),
-            'Numeric literal must start with a decimal digit or a decimal point');
-
-        start = index;
-        number = '';
-        if (ch !== '.') {
-            number = source[index++];
-            ch = source[index];
-
-            // Hex number starts with '0x'.
-            // Octal number starts with '0'.
-            if (number === '0') {
-                // decimal number starts with '0' such as '09' is illegal.
-                if (ch && isDecimalDigit(ch.charCodeAt(0))) {
-                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-                }
-            }
-
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === '.') {
-            number += source[index++];
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === 'e' || ch === 'E') {
-            number += source[index++];
-
-            ch = source[index];
-            if (ch === '+' || ch === '-') {
-                number += source[index++];
-            }
-            if (isDecimalDigit(source.charCodeAt(index))) {
-                while (isDecimalDigit(source.charCodeAt(index))) {
-                    number += source[index++];
-                }
-            } else {
-                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-            }
-        }
-
-        if (isIdentifierStart(source.charCodeAt(index))) {
-            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseFloat(number),
-            range: [start, index]
-        };
-    }
-
-    // 7.8.4 String Literals
-
-    function scanStringLiteral() {
-        var str = '', quote, start, ch, octal = false;
-
-        quote = source[index];
-        assert((quote === '\'' || quote === '"'),
-            'String literal must starts with a quote');
-
-        start = index;
-        ++index;
-
-        while (index < length) {
-            ch = source[index++];
-
-            if (ch === quote) {
-                quote = '';
-                break;
-            } else if (ch === '\\') {
-                ch = source[index++];
-                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {
-                    switch (ch) {
-                    case 'n':
-                        str += '\n';
-                        break;
-                    case 'r':
-                        str += '\r';
-                        break;
-                    case 't':
-                        str += '\t';
-                        break;
-                    case 'b':
-                        str += '\b';
-                        break;
-                    case 'f':
-                        str += '\f';
-                        break;
-                    case 'v':
-                        str += '\x0B';
-                        break;
-
-                    default:
-                        str += ch;
-                        break;
-                    }
-                } else {
-                    if (ch ===  '\r' && source[index] === '\n') {
-                        ++index;
-                    }
-                }
-            } else if (isLineTerminator(ch.charCodeAt(0))) {
-                break;
-            } else {
-                str += ch;
-            }
-        }
-
-        if (quote !== '') {
-            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-        }
-
-        return {
-            type: Token.StringLiteral,
-            value: str,
-            octal: octal,
-            range: [start, index]
-        };
-    }
-
-    function isIdentifierName(token) {
-        return token.type === Token.Identifier ||
-            token.type === Token.Keyword ||
-            token.type === Token.BooleanLiteral ||
-            token.type === Token.NullLiteral;
-    }
-
-    function advance() {
-        var ch;
-
-        skipWhitespace();
-
-        if (index >= length) {
-            return {
-                type: Token.EOF,
-                range: [index, index]
-            };
-        }
-
-        ch = source.charCodeAt(index);
-
-        // Very common: ( and ) and ;
-        if (ch === 40 || ch === 41 || ch === 58) {
-            return scanPunctuator();
-        }
-
-        // String literal starts with single quote (#39) or double quote (#34).
-        if (ch === 39 || ch === 34) {
-            return scanStringLiteral();
-        }
-
-        if (isIdentifierStart(ch)) {
-            return scanIdentifier();
-        }
-
-        // Dot (.) char #46 can also start a floating-point number, hence the need
-        // to check the next character.
-        if (ch === 46) {
-            if (isDecimalDigit(source.charCodeAt(index + 1))) {
-                return scanNumericLiteral();
-            }
-            return scanPunctuator();
-        }
-
-        if (isDecimalDigit(ch)) {
-            return scanNumericLiteral();
-        }
-
-        return scanPunctuator();
-    }
-
-    function lex() {
-        var token;
-
-        token = lookahead;
-        index = token.range[1];
-
-        lookahead = advance();
-
-        index = token.range[1];
-
-        return token;
-    }
-
-    function peek() {
-        var pos;
-
-        pos = index;
-        lookahead = advance();
-        index = pos;
-    }
-
-    // Throw an exception
-
-    function throwError(token, messageFormat) {
-        var error,
-            args = Array.prototype.slice.call(arguments, 2),
-            msg = messageFormat.replace(
-                /%(\d)/g,
-                function (whole, index) {
-                    assert(index < args.length, 'Message reference must be in range');
-                    return args[index];
-                }
-            );
-
-        error = new Error(msg);
-        error.index = index;
-        error.description = msg;
-        throw error;
-    }
-
-    // Throw an exception because of the token.
-
-    function throwUnexpected(token) {
-        throwError(token, Messages.UnexpectedToken, token.value);
-    }
-
-    // Expect the next token to match the specified punctuator.
-    // If not, an exception will be thrown.
-
-    function expect(value) {
-        var token = lex();
-        if (token.type !== Token.Punctuator || token.value !== value) {
-            throwUnexpected(token);
-        }
-    }
-
-    // Return true if the next token matches the specified punctuator.
-
-    function match(value) {
-        return lookahead.type === Token.Punctuator && lookahead.value === value;
-    }
-
-    // Return true if the next token matches the specified keyword
-
-    function matchKeyword(keyword) {
-        return lookahead.type === Token.Keyword && lookahead.value === keyword;
-    }
-
-    function consumeSemicolon() {
-        // Catch the very common case first: immediately a semicolon (char #59).
-        if (source.charCodeAt(index) === 59) {
-            lex();
-            return;
-        }
-
-        skipWhitespace();
-
-        if (match(';')) {
-            lex();
-            return;
-        }
-
-        if (lookahead.type !== Token.EOF && !match('}')) {
-            throwUnexpected(lookahead);
-        }
-    }
-
-    // 11.1.4 Array Initialiser
-
-    function parseArrayInitialiser() {
-        var elements = [];
-
-        expect('[');
-
-        while (!match(']')) {
-            if (match(',')) {
-                lex();
-                elements.push(null);
-            } else {
-                elements.push(parseExpression());
-
-                if (!match(']')) {
-                    expect(',');
-                }
-            }
-        }
-
-        expect(']');
-
-        return delegate.createArrayExpression(elements);
-    }
-
-    // 11.1.5 Object Initialiser
-
-    function parseObjectPropertyKey() {
-        var token;
-
-        skipWhitespace();
-        token = lex();
-
-        // Note: This function is called only from parseObjectProperty(), where
-        // EOF and Punctuator tokens are already filtered out.
-        if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) {
-            return delegate.createLiteral(token);
-        }
-
-        return delegate.createIdentifier(token.value);
-    }
-
-    function parseObjectProperty() {
-        var token, key;
-
-        token = lookahead;
-        skipWhitespace();
-
-        if (token.type === Token.EOF || token.type === Token.Punctuator) {
-            throwUnexpected(token);
-        }
-
-        key = parseObjectPropertyKey();
-        expect(':');
-        return delegate.createProperty('init', key, parseExpression());
-    }
-
-    function parseObjectInitialiser() {
-        var properties = [];
-
-        expect('{');
-
-        while (!match('}')) {
-            properties.push(parseObjectProperty());
-
-            if (!match('}')) {
-                expect(',');
-            }
-        }
-
-        expect('}');
-
-        return delegate.createObjectExpression(properties);
-    }
-
-    // 11.1.6 The Grouping Operator
-
-    function parseGroupExpression() {
-        var expr;
-
-        expect('(');
-
-        expr = parseExpression();
-
-        expect(')');
-
-        return expr;
-    }
-
-
-    // 11.1 Primary Expressions
-
-    function parsePrimaryExpression() {
-        var type, token, expr;
-
-        if (match('(')) {
-            return parseGroupExpression();
-        }
-
-        type = lookahead.type;
-
-        if (type === Token.Identifier) {
-            expr = delegate.createIdentifier(lex().value);
-        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {
-            expr = delegate.createLiteral(lex());
-        } else if (type === Token.Keyword) {
-            if (matchKeyword('this')) {
-                lex();
-                expr = delegate.createThisExpression();
-            }
-        } else if (type === Token.BooleanLiteral) {
-            token = lex();
-            token.value = (token.value === 'true');
-            expr = delegate.createLiteral(token);
-        } else if (type === Token.NullLiteral) {
-            token = lex();
-            token.value = null;
-            expr = delegate.createLiteral(token);
-        } else if (match('[')) {
-            expr = parseArrayInitialiser();
-        } else if (match('{')) {
-            expr = parseObjectInitialiser();
-        }
-
-        if (expr) {
-            return expr;
-        }
-
-        throwUnexpected(lex());
-    }
-
-    // 11.2 Left-Hand-Side Expressions
-
-    function parseArguments() {
-        var args = [];
-
-        expect('(');
-
-        if (!match(')')) {
-            while (index < length) {
-                args.push(parseExpression());
-                if (match(')')) {
-                    break;
-                }
-                expect(',');
-            }
-        }
-
-        expect(')');
-
-        return args;
-    }
-
-    function parseNonComputedProperty() {
-        var token;
-
-        token = lex();
-
-        if (!isIdentifierName(token)) {
-            throwUnexpected(token);
-        }
-
-        return delegate.createIdentifier(token.value);
-    }
-
-    function parseNonComputedMember() {
-        expect('.');
-
-        return parseNonComputedProperty();
-    }
-
-    function parseComputedMember() {
-        var expr;
-
-        expect('[');
-
-        expr = parseExpression();
-
-        expect(']');
-
-        return expr;
-    }
-
-    function parseLeftHandSideExpression() {
-        var expr, args, property;
-
-        expr = parsePrimaryExpression();
-
-        while (true) {
-            if (match('[')) {
-                property = parseComputedMember();
-                expr = delegate.createMemberExpression('[', expr, property);
-            } else if (match('.')) {
-                property = parseNonComputedMember();
-                expr = delegate.createMemberExpression('.', expr, property);
-            } else if (match('(')) {
-                args = parseArguments();
-                expr = delegate.createCallExpression(expr, args);
-            } else {
-                break;
-            }
-        }
-
-        return expr;
-    }
-
-    // 11.3 Postfix Expressions
-
-    var parsePostfixExpression = parseLeftHandSideExpression;
-
-    // 11.4 Unary Operators
-
-    function parseUnaryExpression() {
-        var token, expr;
-
-        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {
-            expr = parsePostfixExpression();
-        } else if (match('+') || match('-') || match('!')) {
-            token = lex();
-            expr = parseUnaryExpression();
-            expr = delegate.createUnaryExpression(token.value, expr);
-        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
-            throwError({}, Messages.UnexpectedToken);
-        } else {
-            expr = parsePostfixExpression();
-        }
-
-        return expr;
-    }
-
-    function binaryPrecedence(token) {
-        var prec = 0;
-
-        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {
-            return 0;
-        }
-
-        switch (token.value) {
-        case '||':
-            prec = 1;
-            break;
-
-        case '&&':
-            prec = 2;
-            break;
-
-        case '==':
-        case '!=':
-        case '===':
-        case '!==':
-            prec = 6;
-            break;
-
-        case '<':
-        case '>':
-        case '<=':
-        case '>=':
-        case 'instanceof':
-            prec = 7;
-            break;
-
-        case 'in':
-            prec = 7;
-            break;
-
-        case '+':
-        case '-':
-            prec = 9;
-            break;
-
-        case '*':
-        case '/':
-        case '%':
-            prec = 11;
-            break;
-
-        default:
-            break;
-        }
-
-        return prec;
-    }
-
-    // 11.5 Multiplicative Operators
-    // 11.6 Additive Operators
-    // 11.7 Bitwise Shift Operators
-    // 11.8 Relational Operators
-    // 11.9 Equality Operators
-    // 11.10 Binary Bitwise Operators
-    // 11.11 Binary Logical Operators
-
-    function parseBinaryExpression() {
-        var expr, token, prec, stack, right, operator, left, i;
-
-        left = parseUnaryExpression();
-
-        token = lookahead;
-        prec = binaryPrecedence(token);
-        if (prec === 0) {
-            return left;
-        }
-        token.prec = prec;
-        lex();
-
-        right = parseUnaryExpression();
-
-        stack = [left, token, right];
-
-        while ((prec = binaryPrecedence(lookahead)) > 0) {
-
-            // Reduce: make a binary expression from the three topmost entries.
-            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {
-                right = stack.pop();
-                operator = stack.pop().value;
-                left = stack.pop();
-                expr = delegate.createBinaryExpression(operator, left, right);
-                stack.push(expr);
-            }
-
-            // Shift.
-            token = lex();
-            token.prec = prec;
-            stack.push(token);
-            expr = parseUnaryExpression();
-            stack.push(expr);
-        }
-
-        // Final reduce to clean-up the stack.
-        i = stack.length - 1;
-        expr = stack[i];
-        while (i > 1) {
-            expr = delegate.createBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
-            i -= 2;
-        }
-
-        return expr;
-    }
-
-
-    // 11.12 Conditional Operator
-
-    function parseConditionalExpression() {
-        var expr, consequent, alternate;
-
-        expr = parseBinaryExpression();
-
-        if (match('?')) {
-            lex();
-            consequent = parseConditionalExpression();
-            expect(':');
-            alternate = parseConditionalExpression();
-
-            expr = delegate.createConditionalExpression(expr, consequent, alternate);
-        }
-
-        return expr;
-    }
-
-    // Simplification since we do not support AssignmentExpression.
-    var parseExpression = parseConditionalExpression;
-
-    // Polymer Syntax extensions
-
-    // Filter ::
-    //   Identifier
-    //   Identifier "(" ")"
-    //   Identifier "(" FilterArguments ")"
-
-    function parseFilter() {
-        var identifier, args;
-
-        identifier = lex();
-
-        if (identifier.type !== Token.Identifier) {
-            throwUnexpected(identifier);
-        }
-
-        args = match('(') ? parseArguments() : [];
-
-        return delegate.createFilter(identifier.value, args);
-    }
-
-    // Filters ::
-    //   "|" Filter
-    //   Filters "|" Filter
-
-    function parseFilters() {
-        while (match('|')) {
-            lex();
-            parseFilter();
-        }
-    }
-
-    // TopLevel ::
-    //   LabelledExpressions
-    //   AsExpression
-    //   InExpression
-    //   FilterExpression
-
-    // AsExpression ::
-    //   FilterExpression as Identifier
-
-    // InExpression ::
-    //   Identifier, Identifier in FilterExpression
-    //   Identifier in FilterExpression
-
-    // FilterExpression ::
-    //   Expression
-    //   Expression Filters
-
-    function parseTopLevel() {
-        skipWhitespace();
-        peek();
-
-        var expr = parseExpression();
-        if (expr) {
-            if (lookahead.value === ',' || lookahead.value == 'in' &&
-                       expr.type === Syntax.Identifier) {
-                parseInExpression(expr);
-            } else {
-                parseFilters();
-                if (lookahead.value === 'as') {
-                    parseAsExpression(expr);
-                } else {
-                    delegate.createTopLevel(expr);
-                }
-            }
-        }
-
-        if (lookahead.type !== Token.EOF) {
-            throwUnexpected(lookahead);
-        }
-    }
-
-    function parseAsExpression(expr) {
-        lex();  // as
-        var identifier = lex().value;
-        delegate.createAsExpression(expr, identifier);
-    }
-
-    function parseInExpression(identifier) {
-        var indexName;
-        if (lookahead.value === ',') {
-            lex();
-            if (lookahead.type !== Token.Identifier)
-                throwUnexpected(lookahead);
-            indexName = lex().value;
-        }
-
-        lex();  // in
-        var expr = parseExpression();
-        parseFilters();
-        delegate.createInExpression(identifier.name, indexName, expr);
-    }
-
-    function parse(code, inDelegate) {
-        delegate = inDelegate;
-        source = code;
-        index = 0;
-        length = source.length;
-        lookahead = null;
-        state = {
-            labelSet: {}
-        };
-
-        return parseTopLevel();
-    }
-
-    global.esprima = {
-        parse: parse
-    };
-})(this);
-
-// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-// Code distributed by Google as part of the polymer project is also
-// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-
-(function (global) {
-  'use strict';
-
-  function prepareBinding(expressionText, name, node, filterRegistry) {
-    var expression;
-    try {
-      expression = getExpression(expressionText);
-      if (expression.scopeIdent &&
-          (node.nodeType !== Node.ELEMENT_NODE ||
-           node.tagName !== 'TEMPLATE' ||
-           (name !== 'bind' && name !== 'repeat'))) {
-        throw Error('as and in can only be used within <template bind/repeat>');
-      }
-    } catch (ex) {
-      console.error('Invalid expression syntax: ' + expressionText, ex);
-      return;
-    }
-
-    return function(model, node, oneTime) {
-      var binding = expression.getBinding(model, filterRegistry, oneTime);
-      if (expression.scopeIdent && binding) {
-        node.polymerExpressionScopeIdent_ = expression.scopeIdent;
-        if (expression.indexIdent)
-          node.polymerExpressionIndexIdent_ = expression.indexIdent;
-      }
-
-      return binding;
-    }
-  }
-
-  // TODO(rafaelw): Implement simple LRU.
-  var expressionParseCache = Object.create(null);
-
-  function getExpression(expressionText) {
-    var expression = expressionParseCache[expressionText];
-    if (!expression) {
-      var delegate = new ASTDelegate();
-      esprima.parse(expressionText, delegate);
-      expression = new Expression(delegate);
-      expressionParseCache[expressionText] = expression;
-    }
-    return expression;
-  }
-
-  function Literal(value) {
-    this.value = value;
-    this.valueFn_ = undefined;
-  }
-
-  Literal.prototype = {
-    valueFn: function() {
-      if (!this.valueFn_) {
-        var value = this.value;
-        this.valueFn_ = function() {
-          return value;
-        }
-      }
-
-      return this.valueFn_;
-    }
-  }
-
-  function IdentPath(name) {
-    this.name = name;
-    this.path = Path.get(name);
-  }
-
-  IdentPath.prototype = {
-    valueFn: function() {
-      if (!this.valueFn_) {
-        var name = this.name;
-        var path = this.path;
-        this.valueFn_ = function(model, observer) {
-          if (observer)
-            observer.addPath(model, path);
-
-          return path.getValueFrom(model);
-        }
-      }
-
-      return this.valueFn_;
-    },
-
-    setValue: function(model, newValue) {
-      if (this.path.length == 1)
-        model = findScope(model, this.path[0]);
-
-      return this.path.setValueFrom(model, newValue);
-    }
-  };
-
-  function MemberExpression(object, property, accessor) {
-    this.computed = accessor == '[';
-
-    this.dynamicDeps = typeof object == 'function' ||
-                       object.dynamicDeps ||
-                       (this.computed && !(property instanceof Literal));
-
-    this.simplePath =
-        !this.dynamicDeps &&
-        (property instanceof IdentPath || property instanceof Literal) &&
-        (object instanceof MemberExpression || object instanceof IdentPath);
-
-    this.object = this.simplePath ? object : getFn(object);
-    this.property = !this.computed || this.simplePath ?
-        property : getFn(property);
-  }
-
-  MemberExpression.prototype = {
-    get fullPath() {
-      if (!this.fullPath_) {
-
-        var parts = this.object instanceof MemberExpression ?
-            this.object.fullPath.slice() : [this.object.name];
-        parts.push(this.property instanceof IdentPath ?
-            this.property.name : this.property.value);
-        this.fullPath_ = Path.get(parts);
-      }
-
-      return this.fullPath_;
-    },
-
-    valueFn: function() {
-      if (!this.valueFn_) {
-        var object = this.object;
-
-        if (this.simplePath) {
-          var path = this.fullPath;
-
-          this.valueFn_ = function(model, observer) {
-            if (observer)
-              observer.addPath(model, path);
-
-            return path.getValueFrom(model);
-          };
-        } else if (!this.computed) {
-          var path = Path.get(this.property.name);
-
-          this.valueFn_ = function(model, observer, filterRegistry) {
-            var context = object(model, observer, filterRegistry);
-
-            if (observer)
-              observer.addPath(context, path);
-
-            return path.getValueFrom(context);
-          }
-        } else {
-          // Computed property.
-          var property = this.property;
-
-          this.valueFn_ = function(model, observer, filterRegistry) {
-            var context = object(model, observer, filterRegistry);
-            var propName = property(model, observer, filterRegistry);
-            if (observer)
-              observer.addPath(context, [propName]);
-
-            return context ? context[propName] : undefined;
-          };
-        }
-      }
-      return this.valueFn_;
-    },
-
-    setValue: function(model, newValue) {
-      if (this.simplePath) {
-        this.fullPath.setValueFrom(model, newValue);
-        return newValue;
-      }
-
-      var object = this.object(model);
-      var propName = this.property instanceof IdentPath ? this.property.name :
-          this.property(model);
-      return object[propName] = newValue;
-    }
-  };
-
-  function Filter(name, args) {
-    this.name = name;
-    this.args = [];
-    for (var i = 0; i < args.length; i++) {
-      this.args[i] = getFn(args[i]);
-    }
-  }
-
-  Filter.prototype = {
-    transform: function(model, observer, filterRegistry, toModelDirection,
-                        initialArgs) {
-      var context = model;
-      var fn = context[this.name];
-
-      if (!fn) {
-        fn = filterRegistry[this.name];
-        if (!fn) {
-          console.error('Cannot find function or filter: ' + this.name);
-          return;
-        }
-      }
-
-      // If toModelDirection is falsey, then the "normal" (dom-bound) direction
-      // is used. Otherwise, it looks for a 'toModel' property function on the
-      // object.
-      if (toModelDirection) {
-        fn = fn.toModel;
-      } else if (typeof fn.toDOM == 'function') {
-        fn = fn.toDOM;
-      }
-
-      if (typeof fn != 'function') {
-        console.error('Cannot find function or filter: ' + this.name);
-        return;
-      }
-
-      var args = initialArgs || [];
-      for (var i = 0; i < this.args.length; i++) {
-        args.push(getFn(this.args[i])(model, observer, filterRegistry));
-      }
-
-      return fn.apply(context, args);
-    }
-  };
-
-  function notImplemented() { throw Error('Not Implemented'); }
-
-  var unaryOperators = {
-    '+': function(v) { return +v; },
-    '-': function(v) { return -v; },
-    '!': function(v) { return !v; }
-  };
-
-  var binaryOperators = {
-    '+': function(l, r) { return l+r; },
-    '-': function(l, r) { return l-r; },
-    '*': function(l, r) { return l*r; },
-    '/': function(l, r) { return l/r; },
-    '%': function(l, r) { return l%r; },
-    '<': function(l, r) { return l<r; },
-    '>': function(l, r) { return l>r; },
-    '<=': function(l, r) { return l<=r; },
-    '>=': function(l, r) { return l>=r; },
-    '==': function(l, r) { return l==r; },
-    '!=': function(l, r) { return l!=r; },
-    '===': function(l, r) { return l===r; },
-    '!==': function(l, r) { return l!==r; },
-    '&&': function(l, r) { return l&&r; },
-    '||': function(l, r) { return l||r; },
-  };
-
-  function getFn(arg) {
-    return typeof arg == 'function' ? arg : arg.valueFn();
-  }
-
-  function ASTDelegate() {
-    this.expression = null;
-    this.filters = [];
-    this.deps = {};
-    this.currentPath = undefined;
-    this.scopeIdent = undefined;
-    this.indexIdent = undefined;
-    this.dynamicDeps = false;
-  }
-
-  ASTDelegate.prototype = {
-    createUnaryExpression: function(op, argument) {
-      if (!unaryOperators[op])
-        throw Error('Disallowed operator: ' + op);
-
-      argument = getFn(argument);
-
-      return function(model, observer, filterRegistry) {
-        return unaryOperators[op](argument(model, observer, filterRegistry));
-      };
-    },
-
-    createBinaryExpression: function(op, left, right) {
-      if (!binaryOperators[op])
-        throw Error('Disallowed operator: ' + op);
-
-      left = getFn(left);
-      right = getFn(right);
-
-      switch (op) {
-        case '||':
-          this.dynamicDeps = true;
-          return function(model, observer, filterRegistry) {
-            return left(model, observer, filterRegistry) ||
-                right(model, observer, filterRegistry);
-          };
-        case '&&':
-          this.dynamicDeps = true;
-          return function(model, observer, filterRegistry) {
-            return left(model, observer, filterRegistry) &&
-                right(model, observer, filterRegistry);
-          };
-      }
-
-      return function(model, observer, filterRegistry) {
-        return binaryOperators[op](left(model, observer, filterRegistry),
-                                   right(model, observer, filterRegistry));
-      };
-    },
-
-    createConditionalExpression: function(test, consequent, alternate) {
-      test = getFn(test);
-      consequent = getFn(consequent);
-      alternate = getFn(alternate);
-
-      this.dynamicDeps = true;
-
-      return function(model, observer, filterRegistry) {
-        return test(model, observer, filterRegistry) ?
-            consequent(model, observer, filterRegistry) :
-            alternate(model, observer, filterRegistry);
-      }
-    },
-
-    createIdentifier: function(name) {
-      var ident = new IdentPath(name);
-      ident.type = 'Identifier';
-      return ident;
-    },
-
-    createMemberExpression: function(accessor, object, property) {
-      var ex = new MemberExpression(object, property, accessor);
-      if (ex.dynamicDeps)
-        this.dynamicDeps = true;
-      return ex;
-    },
-
-    createCallExpression: function(expression, args) {
-      if (!(expression instanceof IdentPath))
-        throw Error('Only identifier function invocations are allowed');
-
-      var filter = new Filter(expression.name, args);
-
-      return function(model, observer, filterRegistry) {
-        return filter.transform(model, observer, filterRegistry, false);
-      };
-    },
-
-    createLiteral: function(token) {
-      return new Literal(token.value);
-    },
-
-    createArrayExpression: function(elements) {
-      for (var i = 0; i < elements.length; i++)
-        elements[i] = getFn(elements[i]);
-
-      return function(model, observer, filterRegistry) {
-        var arr = []
-        for (var i = 0; i < elements.length; i++)
-          arr.push(elements[i](model, observer, filterRegistry));
-        return arr;
-      }
-    },
-
-    createProperty: function(kind, key, value) {
-      return {
-        key: key instanceof IdentPath ? key.name : key.value,
-        value: value
-      };
-    },
-
-    createObjectExpression: function(properties) {
-      for (var i = 0; i < properties.length; i++)
-        properties[i].value = getFn(properties[i].value);
-
-      return function(model, observer, filterRegistry) {
-        var obj = {};
-        for (var i = 0; i < properties.length; i++)
-          obj[properties[i].key] =
-              properties[i].value(model, observer, filterRegistry);
-        return obj;
-      }
-    },
-
-    createFilter: function(name, args) {
-      this.filters.push(new Filter(name, args));
-    },
-
-    createAsExpression: function(expression, scopeIdent) {
-      this.expression = expression;
-      this.scopeIdent = scopeIdent;
-    },
-
-    createInExpression: function(scopeIdent, indexIdent, expression) {
-      this.expression = expression;
-      this.scopeIdent = scopeIdent;
-      this.indexIdent = indexIdent;
-    },
-
-    createTopLevel: function(expression) {
-      this.expression = expression;
-    },
-
-    createThisExpression: notImplemented
-  }
-
-  function ConstantObservable(value) {
-    this.value_ = value;
-  }
-
-  ConstantObservable.prototype = {
-    open: function() { return this.value_; },
-    discardChanges: function() { return this.value_; },
-    deliver: function() {},
-    close: function() {},
-  }
-
-  function Expression(delegate) {
-    this.scopeIdent = delegate.scopeIdent;
-    this.indexIdent = delegate.indexIdent;
-
-    if (!delegate.expression)
-      throw Error('No expression found.');
-
-    this.expression = delegate.expression;
-    getFn(this.expression); // forces enumeration of path dependencies
-
-    this.filters = delegate.filters;
-    this.dynamicDeps = delegate.dynamicDeps;
-  }
-
-  Expression.prototype = {
-    getBinding: function(model, filterRegistry, oneTime) {
-      if (oneTime)
-        return this.getValue(model, undefined, filterRegistry);
-
-      var observer = new CompoundObserver();
-      // captures deps.
-      var firstValue = this.getValue(model, observer, filterRegistry);
-      var firstTime = true;
-      var self = this;
-
-      function valueFn() {
-        // deps cannot have changed on first value retrieval.
-        if (firstTime) {
-          firstTime = false;
-          return firstValue;
-        }
-
-        if (self.dynamicDeps)
-          observer.startReset();
-
-        var value = self.getValue(model,
-                                  self.dynamicDeps ? observer : undefined,
-                                  filterRegistry);
-        if (self.dynamicDeps)
-          observer.finishReset();
-
-        return value;
-      }
-
-      function setValueFn(newValue) {
-        self.setValue(model, newValue, filterRegistry);
-        return newValue;
-      }
-
-      return new ObserverTransform(observer, valueFn, setValueFn, true);
-    },
-
-    getValue: function(model, observer, filterRegistry) {
-      var value = getFn(this.expression)(model, observer, filterRegistry);
-      for (var i = 0; i < this.filters.length; i++) {
-        value = this.filters[i].transform(model, observer, filterRegistry,
-            false, [value]);
-      }
-
-      return value;
-    },
-
-    setValue: function(model, newValue, filterRegistry) {
-      var count = this.filters ? this.filters.length : 0;
-      while (count-- > 0) {
-        newValue = this.filters[count].transform(model, undefined,
-            filterRegistry, true, [newValue]);
-      }
-
-      if (this.expression.setValue)
-        return this.expression.setValue(model, newValue);
-    }
-  }
-
-  /**
-   * Converts a style property name to a css property name. For example:
-   * "WebkitUserSelect" to "-webkit-user-select"
-   */
-  function convertStylePropertyName(name) {
-    return String(name).replace(/[A-Z]/g, function(c) {
-      return '-' + c.toLowerCase();
-    });
-  }
-
-  var parentScopeName = '@' + Math.random().toString(36).slice(2);
-
-  // Single ident paths must bind directly to the appropriate scope object.
-  // I.e. Pushed values in two-bindings need to be assigned to the actual model
-  // object.
-  function findScope(model, prop) {
-    while (model[parentScopeName] &&
-           !Object.prototype.hasOwnProperty.call(model, prop)) {
-      model = model[parentScopeName];
-    }
-
-    return model;
-  }
-
-  function isLiteralExpression(pathString) {
-    switch (pathString) {
-      case '':
-        return false;
-
-      case 'false':
-      case 'null':
-      case 'true':
-        return true;
-    }
-
-    if (!isNaN(Number(pathString)))
-      return true;
-
-    return false;
-  };
-
-  function PolymerExpressions() {}
-
-  PolymerExpressions.prototype = {
-    // "built-in" filters
-    styleObject: function(value) {
-      var parts = [];
-      for (var key in value) {
-        parts.push(convertStylePropertyName(key) + ': ' + value[key]);
-      }
-      return parts.join('; ');
-    },
-
-    tokenList: function(value) {
-      var tokens = [];
-      for (var key in value) {
-        if (value[key])
-          tokens.push(key);
-      }
-      return tokens.join(' ');
-    },
-
-    // binding delegate API
-    prepareInstancePositionChanged: function(template) {
-      var indexIdent = template.polymerExpressionIndexIdent_;
-      if (!indexIdent)
-        return;
-
-      return function(templateInstance, index) {
-        templateInstance.model[indexIdent] = index;
-      };
-    },
-
-    prepareBinding: function(pathString, name, node) {
-      var path = Path.get(pathString);
-
-      if (!isLiteralExpression(pathString) && path.valid) {
-        if (path.length == 1) {
-          return function(model, node, oneTime) {
-            if (oneTime)
-              return path.getValueFrom(model);
-
-            var scope = findScope(model, path[0]);
-            return new PathObserver(scope, path);
-          };
-        }
-        return; // bail out early if pathString is simple path.
-      }
-
-      return prepareBinding(pathString, name, node, this);
-    },
-
-    prepareInstanceModel: function(template) {
-      var scopeName = template.polymerExpressionScopeIdent_;
-      if (!scopeName)
-        return;
-
-      var parentScope = template.templateInstance ?
-          template.templateInstance.model :
-          template.model;
-
-      var indexName = template.polymerExpressionIndexIdent_;
-
-      return function(model) {
-        return createScopeObject(parentScope, model, scopeName, indexName);
-      };
-    }
-  };
-
-  var createScopeObject = ('__proto__' in {}) ?
-    function(parentScope, model, scopeName, indexName) {
-      var scope = {};
-      scope[scopeName] = model;
-      scope[indexName] = undefined;
-      scope[parentScopeName] = parentScope;
-      scope.__proto__ = parentScope;
-      return scope;
-    } :
-    function(parentScope, model, scopeName, indexName) {
-      var scope = Object.create(parentScope);
-      Object.defineProperty(scope, scopeName,
-          { value: model, configurable: true, writable: true });
-      Object.defineProperty(scope, indexName,
-          { value: undefined, configurable: true, writable: true });
-      Object.defineProperty(scope, parentScopeName,
-          { value: parentScope, configurable: true, writable: true });
-      return scope;
-    };
-
-  global.PolymerExpressions = PolymerExpressions;
-  PolymerExpressions.getExpression = getExpression;
-})(this);
-
-Polymer = {
-  version: '0.5.5'
-};
-
-// TODO(sorvell): this ensures Polymer is an object and not a function
-// Platform is currently defining it as a function to allow for async loading
-// of polymer; once we refine the loading process this likely goes away.
-if (typeof window.Polymer === 'function') {
-  Polymer = {};
-}
-
-
-(function(scope) {
-
-  function withDependencies(task, depends) {
-    depends = depends || [];
-    if (!depends.map) {
-      depends = [depends];
-    }
-    return task.apply(this, depends.map(marshal));
-  }
-
-  function module(name, dependsOrFactory, moduleFactory) {
-    var module;
-    switch (arguments.length) {
-      case 0:
-        return;
-      case 1:
-        module = null;
-        break;
-      case 2:
-        // dependsOrFactory is `factory` in this case
-        module = dependsOrFactory.apply(this);
-        break;
-      default:
-        // dependsOrFactory is `depends` in this case
-        module = withDependencies(moduleFactory, dependsOrFactory);
-        break;
-    }
-    modules[name] = module;
-  };
-
-  function marshal(name) {
-    return modules[name];
-  }
-
-  var modules = {};
-
-  function using(depends, task) {
-    HTMLImports.whenImportsReady(function() {
-      withDependencies(task, depends);
-    });
-  };
-
-  // exports
-
-  scope.marshal = marshal;
-  // `module` confuses commonjs detectors
-  scope.modularize = module;
-  scope.using = using;
-
-})(window);
-
-/*
-        Build only script.
-
-  Ensures scripts needed for basic x-platform compatibility
-  will be run when platform.js is not loaded.
- */
-if (!window.WebComponents) {
-
-/*
-        On supported platforms, platform.js is not needed. To retain compatibility
-        with the polyfills, we stub out minimal functionality.
- */
-if (!window.WebComponents) {
-
-  WebComponents = {
-        flush: function() {},
-    flags: {log: {}}
-  };
-
-  Platform = WebComponents;
-
-  CustomElements = {
-        useNative: true,
-    ready: true,
-    takeRecords: function() {},
-    instanceof: function(obj, base) {
-      return obj instanceof base;
-    }
-  };
-  
-  HTMLImports = {
-        useNative: true
-  };
-
-  
-  addEventListener('HTMLImportsLoaded', function() {
-    document.dispatchEvent(
-      new CustomEvent('WebComponentsReady', {bubbles: true})
-    );
-  });
-
-
-  // ShadowDOM
-  ShadowDOMPolyfill = null;
-  wrap = unwrap = function(n){
-    return n;
-  };
-
-}
-
-/*
-  Create polyfill scope and feature detect native support.
-*/
-window.HTMLImports = window.HTMLImports || {flags:{}};
-
-(function(scope) {
-
-/**
-  Basic setup and simple module executer. We collect modules and then execute
-  the code later, only if it's necessary for polyfilling.
-*/
-var IMPORT_LINK_TYPE = 'import';
-var useNative = Boolean(IMPORT_LINK_TYPE in document.createElement('link'));
-
-/**
-  Support `currentScript` on all browsers as `document._currentScript.`
-
-  NOTE: We cannot polyfill `document.currentScript` because it's not possible
-  both to override and maintain the ability to capture the native value.
-  Therefore we choose to expose `_currentScript` both when native imports
-  and the polyfill are in use.
-*/
-// NOTE: ShadowDOMPolyfill intrusion.
-var hasShadowDOMPolyfill = Boolean(window.ShadowDOMPolyfill);
-var wrap = function(node) {
-  return hasShadowDOMPolyfill ? ShadowDOMPolyfill.wrapIfNeeded(node) : node;
-};
-var rootDocument = wrap(document);
-
-var currentScriptDescriptor = {
-  get: function() {
-    var script = HTMLImports.currentScript || document.currentScript ||
-        // NOTE: only works when called in synchronously executing code.
-        // readyState should check if `loading` but IE10 is
-        // interactive when scripts run so we cheat.
-        (document.readyState !== 'complete' ?
-        document.scripts[document.scripts.length - 1] : null);
-    return wrap(script);
-  },
-  configurable: true
-};
-
-Object.defineProperty(document, '_currentScript', currentScriptDescriptor);
-Object.defineProperty(rootDocument, '_currentScript', currentScriptDescriptor);
-
-/**
-  Add support for the `HTMLImportsLoaded` event and the `HTMLImports.whenReady`
-  method. This api is necessary because unlike the native implementation,
-  script elements do not force imports to resolve. Instead, users should wrap
-  code in either an `HTMLImportsLoaded` hander or after load time in an
-  `HTMLImports.whenReady(callback)` call.
-
-  NOTE: This module also supports these apis under the native implementation.
-  Therefore, if this file is loaded, the same code can be used under both
-  the polyfill and native implementation.
- */
-
-var isIE = /Trident/.test(navigator.userAgent);
-
-// call a callback when all HTMLImports in the document at call time
-// (or at least document ready) have loaded.
-// 1. ensure the document is in a ready state (has dom), then
-// 2. watch for loading of imports and call callback when done
-function whenReady(callback, doc) {
-  doc = doc || rootDocument;
-  // if document is loading, wait and try again
-  whenDocumentReady(function() {
-    watchImportsLoad(callback, doc);
-  }, doc);
-}
-
-// call the callback when the document is in a ready state (has dom)
-var requiredReadyState = isIE ? 'complete' : 'interactive';
-var READY_EVENT = 'readystatechange';
-function isDocumentReady(doc) {
-  return (doc.readyState === 'complete' ||
-      doc.readyState === requiredReadyState);
-}
-
-// call <callback> when we ensure the document is in a ready state
-function whenDocumentReady(callback, doc) {
-  if (!isDocumentReady(doc)) {
-    var checkReady = function() {
-      if (doc.readyState === 'complete' ||
-          doc.readyState === requiredReadyState) {
-        doc.removeEventListener(READY_EVENT, checkReady);
-        whenDocumentReady(callback, doc);
-      }
-    };
-    doc.addEventListener(READY_EVENT, checkReady);
-  } else if (callback) {
-    callback();
-  }
-}
-
-function markTargetLoaded(event) {
-  event.target.__loaded = true;
-}
-
-// call <callback> when we ensure all imports have loaded
-function watchImportsLoad(callback, doc) {
-  var imports = doc.querySelectorAll('link[rel=import]');
-  var loaded = 0, l = imports.length;
-  function checkDone(d) {
-    if ((loaded == l) && callback) {
-       callback();
-    }
-  }
-  function loadedImport(e) {
-    markTargetLoaded(e);
-    loaded++;
-    checkDone();
-  }
-  if (l) {
-    for (var i=0, imp; (i<l) && (imp=imports[i]); i++) {
-      if (isImportLoaded(imp)) {
-        loadedImport.call(imp, {target: imp});
-      } else {
-        imp.addEventListener('load', loadedImport);
-        imp.addEventListener('error', loadedImport);
-      }
-    }
-  } else {
-    checkDone();
-  }
-}
-
-// NOTE: test for native imports loading is based on explicitly watching
-// all imports (see below).
-// However, we cannot rely on this entirely without watching the entire document
-// for import links. For perf reasons, currently only head is watched.
-// Instead, we fallback to checking if the import property is available
-// and the document is not itself loading.
-function isImportLoaded(link) {
-  return useNative ? link.__loaded ||
-      (link.import && link.import.readyState !== 'loading') :
-      link.__importParsed;
-}
-
-// TODO(sorvell): Workaround for
-// https://www.w3.org/Bugs/Public/show_bug.cgi?id=25007, should be removed when
-// this bug is addressed.
-// (1) Install a mutation observer to see when HTMLImports have loaded
-// (2) if this script is run during document load it will watch any existing
-// imports for loading.
-//
-// NOTE: The workaround has restricted functionality: (1) it's only compatible
-// with imports that are added to document.head since the mutation observer
-// watches only head for perf reasons, (2) it requires this script
-// to run before any imports have completed loading.
-if (useNative) {
-  new MutationObserver(function(mxns) {
-    for (var i=0, l=mxns.length, m; (i < l) && (m=mxns[i]); i++) {
-      if (m.addedNodes) {
-        handleImports(m.addedNodes);
-      }
-    }
-  }).observe(document.head, {childList: true});
-
-  function handleImports(nodes) {
-    for (var i=0, l=nodes.length, n; (i<l) && (n=nodes[i]); i++) {
-      if (isImport(n)) {
-        handleImport(n);
-      }
-    }
-  }
-
-  function isImport(element) {
-    return element.localName === 'link' && element.rel === 'import';
-  }
-
-  function handleImport(element) {
-    var loaded = element.import;
-    if (loaded) {
-      markTargetLoaded({target: element});
-    } else {
-      element.addEventListener('load', markTargetLoaded);
-      element.addEventListener('error', markTargetLoaded);
-    }
-  }
-
-  // make sure to catch any imports that are in the process of loading
-  // when this script is run.
-  (function() {
-    if (document.readyState === 'loading') {
-      var imports = document.querySelectorAll('link[rel=import]');
-      for (var i=0, l=imports.length, imp; (i<l) && (imp=imports[i]); i++) {
-        handleImport(imp);
-      }
-    }
-  })();
-
-}
-
-// Fire the 'HTMLImportsLoaded' event when imports in document at load time
-// have loaded. This event is required to simulate the script blocking
-// behavior of native imports. A main document script that needs to be sure
-// imports have loaded should wait for this event.
-whenReady(function() {
-  HTMLImports.ready = true;
-  HTMLImports.readyTime = new Date().getTime();
-  rootDocument.dispatchEvent(
-    new CustomEvent('HTMLImportsLoaded', {bubbles: true})
-  );
-});
-
-// exports
-scope.IMPORT_LINK_TYPE = IMPORT_LINK_TYPE;
-scope.useNative = useNative;
-scope.rootDocument = rootDocument;
-scope.whenReady = whenReady;
-scope.isIE = isIE;
-
-})(HTMLImports);
-
-(function(scope) {
-
-  // TODO(sorvell): It's desireable to provide a default stylesheet 
-  // that's convenient for styling unresolved elements, but
-  // it's cumbersome to have to include this manually in every page.
-  // It would make sense to put inside some HTMLImport but 
-  // the HTMLImports polyfill does not allow loading of stylesheets 
-  // that block rendering. Therefore this injection is tolerated here.
-  var style = document.createElement('style');
-  style.textContent = ''
-      + 'body {'
-      + 'transition: opacity ease-in 0.2s;' 
-      + ' } \n'
-      + 'body[unresolved] {'
-      + 'opacity: 0; display: block; overflow: hidden;' 
-      + ' } \n'
-      ;
-  var head = document.querySelector('head');
-  head.insertBefore(style, head.firstChild);
-
-})(Platform);
-
-/*
-        Build only script.
-
-  Ensures scripts needed for basic x-platform compatibility
-  will be run when platform.js is not loaded.
- */
-}
-(function(global) {
-  'use strict';
-
-  var testingExposeCycleCount = global.testingExposeCycleCount;
-
-  // Detect and do basic sanity checking on Object/Array.observe.
-  function detectObjectObserve() {
-    if (typeof Object.observe !== 'function' ||
-        typeof Array.observe !== 'function') {
-      return false;
-    }
-
-    var records = [];
-
-    function callback(recs) {
-      records = recs;
-    }
-
-    var test = {};
-    var arr = [];
-    Object.observe(test, callback);
-    Array.observe(arr, callback);
-    test.id = 1;
-    test.id = 2;
-    delete test.id;
-    arr.push(1, 2);
-    arr.length = 0;
-
-    Object.deliverChangeRecords(callback);
-    if (records.length !== 5)
-      return false;
-
-    if (records[0].type != 'add' ||
-        records[1].type != 'update' ||
-        records[2].type != 'delete' ||
-        records[3].type != 'splice' ||
-        records[4].type != 'splice') {
-      return false;
-    }
-
-    Object.unobserve(test, callback);
-    Array.unobserve(arr, callback);
-
-    return true;
-  }
-
-  var hasObserve = detectObjectObserve();
-
-  function detectEval() {
-    // Don't test for eval if we're running in a Chrome App environment.
-    // We check for APIs set that only exist in a Chrome App context.
-    if (typeof chrome !== 'undefined' && chrome.app && chrome.app.runtime) {
-      return false;
-    }
-
-    // Firefox OS Apps do not allow eval. This feature detection is very hacky
-    // but even if some other platform adds support for this function this code
-    // will continue to work.
-    if (typeof navigator != 'undefined' && navigator.getDeviceStorage) {
-      return false;
-    }
-
-    try {
-      var f = new Function('', 'return true;');
-      return f();
-    } catch (ex) {
-      return false;
-    }
-  }
-
-  var hasEval = detectEval();
-
-  function isIndex(s) {
-    return +s === s >>> 0 && s !== '';
-  }
-
-  function toNumber(s) {
-    return +s;
-  }
-
-  function isObject(obj) {
-    return obj === Object(obj);
-  }
-
-  var numberIsNaN = global.Number.isNaN || function(value) {
-    return typeof value === 'number' && global.isNaN(value);
-  }
-
-  function areSameValue(left, right) {
-    if (left === right)
-      return left !== 0 || 1 / left === 1 / right;
-    if (numberIsNaN(left) && numberIsNaN(right))
-      return true;
-
-    return left !== left && right !== right;
-  }
-
-  var createObject = ('__proto__' in {}) ?
-    function(obj) { return obj; } :
-    function(obj) {
-      var proto = obj.__proto__;
-      if (!proto)
-        return obj;
-      var newObject = Object.create(proto);
-      Object.getOwnPropertyNames(obj).forEach(function(name) {
-        Object.defineProperty(newObject, name,
-                             Object.getOwnPropertyDescriptor(obj, name));
-      });
-      return newObject;
-    };
-
-  var identStart = '[\$_a-zA-Z]';
-  var identPart = '[\$_a-zA-Z0-9]';
-  var identRegExp = new RegExp('^' + identStart + '+' + identPart + '*' + '$');
-
-  function getPathCharType(char) {
-    if (char === undefined)
-      return 'eof';
-
-    var code = char.charCodeAt(0);
-
-    switch(code) {
-      case 0x5B: // [
-      case 0x5D: // ]
-      case 0x2E: // .
-      case 0x22: // "
-      case 0x27: // '
-      case 0x30: // 0
-        return char;
-
-      case 0x5F: // _
-      case 0x24: // $
-        return 'ident';
-
-      case 0x20: // Space
-      case 0x09: // Tab
-      case 0x0A: // Newline
-      case 0x0D: // Return
-      case 0xA0:  // No-break space
-      case 0xFEFF:  // Byte Order Mark
-      case 0x2028:  // Line Separator
-      case 0x2029:  // Paragraph Separator
-        return 'ws';
-    }
-
-    // a-z, A-Z
-    if ((0x61 <= code && code <= 0x7A) || (0x41 <= code && code <= 0x5A))
-      return 'ident';
-
-    // 1-9
-    if (0x31 <= code && code <= 0x39)
-      return 'number';
-
-    return 'else';
-  }
-
-  var pathStateMachine = {
-    'beforePath': {
-      'ws': ['beforePath'],
-      'ident': ['inIdent', 'append'],
-      '[': ['beforeElement'],
-      'eof': ['afterPath']
-    },
-
-    'inPath': {
-      'ws': ['inPath'],
-      '.': ['beforeIdent'],
-      '[': ['beforeElement'],
-      'eof': ['afterPath']
-    },
-
-    'beforeIdent': {
-      'ws': ['beforeIdent'],
-      'ident': ['inIdent', 'append']
-    },
-
-    'inIdent': {
-      'ident': ['inIdent', 'append'],
-      '0': ['inIdent', 'append'],
-      'number': ['inIdent', 'append'],
-      'ws': ['inPath', 'push'],
-      '.': ['beforeIdent', 'push'],
-      '[': ['beforeElement', 'push'],
-      'eof': ['afterPath', 'push']
-    },
-
-    'beforeElement': {
-      'ws': ['beforeElement'],
-      '0': ['afterZero', 'append'],
-      'number': ['inIndex', 'append'],
-      "'": ['inSingleQuote', 'append', ''],
-      '"': ['inDoubleQuote', 'append', '']
-    },
-
-    'afterZero': {
-      'ws': ['afterElement', 'push'],
-      ']': ['inPath', 'push']
-    },
-
-    'inIndex': {
-      '0': ['inIndex', 'append'],
-      'number': ['inIndex', 'append'],
-      'ws': ['afterElement'],
-      ']': ['inPath', 'push']
-    },
-
-    'inSingleQuote': {
-      "'": ['afterElement'],
-      'eof': ['error'],
-      'else': ['inSingleQuote', 'append']
-    },
-
-    'inDoubleQuote': {
-      '"': ['afterElement'],
-      'eof': ['error'],
-      'else': ['inDoubleQuote', 'append']
-    },
-
-    'afterElement': {
-      'ws': ['afterElement'],
-      ']': ['inPath', 'push']
-    }
-  }
-
-  function noop() {}
-
-  function parsePath(path) {
-    var keys = [];
-    var index = -1;
-    var c, newChar, key, type, transition, action, typeMap, mode = 'beforePath';
-
-    var actions = {
-      push: function() {
-        if (key === undefined)
-          return;
-
-        keys.push(key);
-        key = undefined;
-      },
-
-      append: function() {
-        if (key === undefined)
-          key = newChar
-        else
-          key += newChar;
-      }
-    };
-
-    function maybeUnescapeQuote() {
-      if (index >= path.length)
-        return;
-
-      var nextChar = path[index + 1];
-      if ((mode == 'inSingleQuote' && nextChar == "'") ||
-          (mode == 'inDoubleQuote' && nextChar == '"')) {
-        index++;
-        newChar = nextChar;
-        actions.append();
-        return true;
-      }
-    }
-
-    while (mode) {
-      index++;
-      c = path[index];
-
-      if (c == '\\' && maybeUnescapeQuote(mode))
-        continue;
-
-      type = getPathCharType(c);
-      typeMap = pathStateMachine[mode];
-      transition = typeMap[type] || typeMap['else'] || 'error';
-
-      if (transition == 'error')
-        return; // parse error;
-
-      mode = transition[0];
-      action = actions[transition[1]] || noop;
-      newChar = transition[2] === undefined ? c : transition[2];
-      action();
-
-      if (mode === 'afterPath') {
-        return keys;
-      }
-    }
-
-    return; // parse error
-  }
-
-  function isIdent(s) {
-    return identRegExp.test(s);
-  }
-
-  var constructorIsPrivate = {};
-
-  function Path(parts, privateToken) {
-    if (privateToken !== constructorIsPrivate)
-      throw Error('Use Path.get to retrieve path objects');
-
-    for (var i = 0; i < parts.length; i++) {
-      this.push(String(parts[i]));
-    }
-
-    if (hasEval && this.length) {
-      this.getValueFrom = this.compiledGetValueFromFn();
-    }
-  }
-
-  // TODO(rafaelw): Make simple LRU cache
-  var pathCache = {};
-
-  function getPath(pathString) {
-    if (pathString instanceof Path)
-      return pathString;
-
-    if (pathString == null || pathString.length == 0)
-      pathString = '';
-
-    if (typeof pathString != 'string') {
-      if (isIndex(pathString.length)) {
-        // Constructed with array-like (pre-parsed) keys
-        return new Path(pathString, constructorIsPrivate);
-      }
-
-      pathString = String(pathString);
-    }
-
-    var path = pathCache[pathString];
-    if (path)
-      return path;
-
-    var parts = parsePath(pathString);
-    if (!parts)
-      return invalidPath;
-
-    var path = new Path(parts, constructorIsPrivate);
-    pathCache[pathString] = path;
-    return path;
-  }
-
-  Path.get = getPath;
-
-  function formatAccessor(key) {
-    if (isIndex(key)) {
-      return '[' + key + ']';
-    } else {
-      return '["' + key.replace(/"/g, '\\"') + '"]';
-    }
-  }
-
-  Path.prototype = createObject({
-    __proto__: [],
-    valid: true,
-
-    toString: function() {
-      var pathString = '';
-      for (var i = 0; i < this.length; i++) {
-        var key = this[i];
-        if (isIdent(key)) {
-          pathString += i ? '.' + key : key;
-        } else {
-          pathString += formatAccessor(key);
-        }
-      }
-
-      return pathString;
-    },
-
-    getValueFrom: function(obj, directObserver) {
-      for (var i = 0; i < this.length; i++) {
-        if (obj == null)
-          return;
-        obj = obj[this[i]];
-      }
-      return obj;
-    },
-
-    iterateObjects: function(obj, observe) {
-      for (var i = 0; i < this.length; i++) {
-        if (i)
-          obj = obj[this[i - 1]];
-        if (!isObject(obj))
-          return;
-        observe(obj, this[i]);
-      }
-    },
-
-    compiledGetValueFromFn: function() {
-      var str = '';
-      var pathString = 'obj';
-      str += 'if (obj != null';
-      var i = 0;
-      var key;
-      for (; i < (this.length - 1); i++) {
-        key = this[i];
-        pathString += isIdent(key) ? '.' + key : formatAccessor(key);
-        str += ' &&\n     ' + pathString + ' != null';
-      }
-      str += ')\n';
-
-      var key = this[i];
-      pathString += isIdent(key) ? '.' + key : formatAccessor(key);
-
-      str += '  return ' + pathString + ';\nelse\n  return undefined;';
-      return new Function('obj', str);
-    },
-
-    setValueFrom: function(obj, value) {
-      if (!this.length)
-        return false;
-
-      for (var i = 0; i < this.length - 1; i++) {
-        if (!isObject(obj))
-          return false;
-        obj = obj[this[i]];
-      }
-
-      if (!isObject(obj))
-        return false;
-
-      obj[this[i]] = value;
-      return true;
-    }
-  });
-
-  var invalidPath = new Path('', constructorIsPrivate);
-  invalidPath.valid = false;
-  invalidPath.getValueFrom = invalidPath.setValueFrom = function() {};
-
-  var MAX_DIRTY_CHECK_CYCLES = 1000;
-
-  function dirtyCheck(observer) {
-    var cycles = 0;
-    while (cycles < MAX_DIRTY_CHECK_CYCLES && observer.check_()) {
-      cycles++;
-    }
-    if (testingExposeCycleCount)
-      global.dirtyCheckCycleCount = cycles;
-
-    return cycles > 0;
-  }
-
-  function objectIsEmpty(object) {
-    for (var prop in object)
-      return false;
-    return true;
-  }
-
-  function diffIsEmpty(diff) {
-    return objectIsEmpty(diff.added) &&
-           objectIsEmpty(diff.removed) &&
-           objectIsEmpty(diff.changed);
-  }
-
-  function diffObjectFromOldObject(object, oldObject) {
-    var added = {};
-    var removed = {};
-    var changed = {};
-
-    for (var prop in oldObject) {
-      var newValue = object[prop];
-
-      if (newValue !== undefined && newValue === oldObject[prop])
-        continue;
-
-      if (!(prop in object)) {
-        removed[prop] = undefined;
-        continue;
-      }
-
-      if (newValue !== oldObject[prop])
-        changed[prop] = newValue;
-    }
-
-    for (var prop in object) {
-      if (prop in oldObject)
-        continue;
-
-      added[prop] = object[prop];
-    }
-
-    if (Array.isArray(object) && object.length !== oldObject.length)
-      changed.length = object.length;
-
-    return {
-      added: added,
-      removed: removed,
-      changed: changed
-    };
-  }
-
-  var eomTasks = [];
-  function runEOMTasks() {
-    if (!eomTasks.length)
-      return false;
-
-    for (var i = 0; i < eomTasks.length; i++) {
-      eomTasks[i]();
-    }
-    eomTasks.length = 0;
-    return true;
-  }
-
-  var runEOM = hasObserve ? (function(){
-    return function(fn) {
-      return Promise.resolve().then(fn);
-    }
-  })() :
-  (function() {
-    return function(fn) {
-      eomTasks.push(fn);
-    };
-  })();
-
-  var observedObjectCache = [];
-
-  function newObservedObject() {
-    var observer;
-    var object;
-    var discardRecords = false;
-    var first = true;
-
-    function callback(records) {
-      if (observer && observer.state_ === OPENED && !discardRecords)
-        observer.check_(records);
-    }
-
-    return {
-      open: function(obs) {
-        if (observer)
-          throw Error('ObservedObject in use');
-
-        if (!first)
-          Object.deliverChangeRecords(callback);
-
-        observer = obs;
-        first = false;
-      },
-      observe: function(obj, arrayObserve) {
-        object = obj;
-        if (arrayObserve)
-          Array.observe(object, callback);
-        else
-          Object.observe(object, callback);
-      },
-      deliver: function(discard) {
-        discardRecords = discard;
-        Object.deliverChangeRecords(callback);
-        discardRecords = false;
-      },
-      close: function() {
-        observer = undefined;
-        Object.unobserve(object, callback);
-        observedObjectCache.push(this);
-      }
-    };
-  }
-
-  /*
-   * The observedSet abstraction is a perf optimization which reduces the total
-   * number of Object.observe observations of a set of objects. The idea is that
-   * groups of Observers will have some object dependencies in common and this
-   * observed set ensures that each object in the transitive closure of
-   * dependencies is only observed once. The observedSet acts as a write barrier
-   * such that whenever any change comes through, all Observers are checked for
-   * changed values.
-   *
-   * Note that this optimization is explicitly moving work from setup-time to
-   * change-time.
-   *
-   * TODO(rafaelw): Implement "garbage collection". In order to move work off
-   * the critical path, when Observers are closed, their observed objects are
-   * not Object.unobserve(d). As a result, it's possible that if the observedSet
-   * is kept open, but some Observers have been closed, it could cause "leaks"
-   * (prevent otherwise collectable objects from being collected). At some
-   * point, we should implement incremental "gc" which keeps a list of
-   * observedSets which may need clean-up and does small amounts of cleanup on a
-   * timeout until all is clean.
-   */
-
-  function getObservedObject(observer, object, arrayObserve) {
-    var dir = observedObjectCache.pop() || newObservedObject();
-    dir.open(observer);
-    dir.observe(object, arrayObserve);
-    return dir;
-  }
-
-  var observedSetCache = [];
-
-  function newObservedSet() {
-    var observerCount = 0;
-    var observers = [];
-    var objects = [];
-    var rootObj;
-    var rootObjProps;
-
-    function observe(obj, prop) {
-      if (!obj)
-        return;
-
-      if (obj === rootObj)
-        rootObjProps[prop] = true;
-
-      if (objects.indexOf(obj) < 0) {
-        objects.push(obj);
-        Object.observe(obj, callback);
-      }
-
-      observe(Object.getPrototypeOf(obj), prop);
-    }
-
-    function allRootObjNonObservedProps(recs) {
-      for (var i = 0; i < recs.length; i++) {
-        var rec = recs[i];
-        if (rec.object !== rootObj ||
-            rootObjProps[rec.name] ||
-            rec.type === 'setPrototype') {
-          return false;
-        }
-      }
-      return true;
-    }
-
-    function callback(recs) {
-      if (allRootObjNonObservedProps(recs))
-        return;
-
-      var observer;
-      for (var i = 0; i < observers.length; i++) {
-        observer = observers[i];
-        if (observer.state_ == OPENED) {
-          observer.iterateObjects_(observe);
-        }
-      }
-
-      for (var i = 0; i < observers.length; i++) {
-        observer = observers[i];
-        if (observer.state_ == OPENED) {
-          observer.check_();
-        }
-      }
-    }
-
-    var record = {
-      objects: objects,
-      get rootObject() { return rootObj; },
-      set rootObject(value) {
-        rootObj = value;
-        rootObjProps = {};
-      },
-      open: function(obs, object) {
-        observers.push(obs);
-        observerCount++;
-        obs.iterateObjects_(observe);
-      },
-      close: function(obs) {
-        observerCount--;
-        if (observerCount > 0) {
-          return;
-        }
-
-        for (var i = 0; i < objects.length; i++) {
-          Object.unobserve(objects[i], callback);
-          Observer.unobservedCount++;
-        }
-
-        observers.length = 0;
-        objects.length = 0;
-        rootObj = undefined;
-        rootObjProps = undefined;
-        observedSetCache.push(this);
-        if (lastObservedSet === this)
-          lastObservedSet = null;
-      },
-    };
-
-    return record;
-  }
-
-  var lastObservedSet;
-
-  function getObservedSet(observer, obj) {
-    if (!lastObservedSet || lastObservedSet.rootObject !== obj) {
-      lastObservedSet = observedSetCache.pop() || newObservedSet();
-      lastObservedSet.rootObject = obj;
-    }
-    lastObservedSet.open(observer, obj);
-    return lastObservedSet;
-  }
-
-  var UNOPENED = 0;
-  var OPENED = 1;
-  var CLOSED = 2;
-  var RESETTING = 3;
-
-  var nextObserverId = 1;
-
-  function Observer() {
-    this.state_ = UNOPENED;
-    this.callback_ = undefined;
-    this.target_ = undefined; // TODO(rafaelw): Should be WeakRef
-    this.directObserver_ = undefined;
-    this.value_ = undefined;
-    this.id_ = nextObserverId++;
-  }
-
-  Observer.prototype = {
-    open: function(callback, target) {
-      if (this.state_ != UNOPENED)
-        throw Error('Observer has already been opened.');
-
-      addToAll(this);
-      this.callback_ = callback;
-      this.target_ = target;
-      this.connect_();
-      this.state_ = OPENED;
-      return this.value_;
-    },
-
-    close: function() {
-      if (this.state_ != OPENED)
-        return;
-
-      removeFromAll(this);
-      this.disconnect_();
-      this.value_ = undefined;
-      this.callback_ = undefined;
-      this.target_ = undefined;
-      this.state_ = CLOSED;
-    },
-
-    deliver: function() {
-      if (this.state_ != OPENED)
-        return;
-
-      dirtyCheck(this);
-    },
-
-    report_: function(changes) {
-      try {
-        this.callback_.apply(this.target_, changes);
-      } catch (ex) {
-        Observer._errorThrownDuringCallback = true;
-        console.error('Exception caught during observer callback: ' +
-                       (ex.stack || ex));
-      }
-    },
-
-    discardChanges: function() {
-      this.check_(undefined, true);
-      return this.value_;
-    }
-  }
-
-  var collectObservers = !hasObserve;
-  var allObservers;
-  Observer._allObserversCount = 0;
-
-  if (collectObservers) {
-    allObservers = [];
-  }
-
-  function addToAll(observer) {
-    Observer._allObserversCount++;
-    if (!collectObservers)
-      return;
-
-    allObservers.push(observer);
-  }
-
-  function removeFromAll(observer) {
-    Observer._allObserversCount--;
-  }
-
-  var runningMicrotaskCheckpoint = false;
-
-  global.Platform = global.Platform || {};
-
-  global.Platform.performMicrotaskCheckpoint = function() {
-    if (runningMicrotaskCheckpoint)
-      return;
-
-    if (!collectObservers)
-      return;
-
-    runningMicrotaskCheckpoint = true;
-
-    var cycles = 0;
-    var anyChanged, toCheck;
-
-    do {
-      cycles++;
-      toCheck = allObservers;
-      allObservers = [];
-      anyChanged = false;
-
-      for (var i = 0; i < toCheck.length; i++) {
-        var observer = toCheck[i];
-        if (observer.state_ != OPENED)
-          continue;
-
-        if (observer.check_())
-          anyChanged = true;
-
-        allObservers.push(observer);
-      }
-      if (runEOMTasks())
-        anyChanged = true;
-    } while (cycles < MAX_DIRTY_CHECK_CYCLES && anyChanged);
-
-    if (testingExposeCycleCount)
-      global.dirtyCheckCycleCount = cycles;
-
-    runningMicrotaskCheckpoint = false;
-  };
-
-  if (collectObservers) {
-    global.Platform.clearObservers = function() {
-      allObservers = [];
-    };
-  }
-
-  function ObjectObserver(object) {
-    Observer.call(this);
-    this.value_ = object;
-    this.oldObject_ = undefined;
-  }
-
-  ObjectObserver.prototype = createObject({
-    __proto__: Observer.prototype,
-
-    arrayObserve: false,
-
-    connect_: function(callback, target) {
-      if (hasObserve) {
-        this.directObserver_ = getObservedObject(this, this.value_,
-                                                 this.arrayObserve);
-      } else {
-        this.oldObject_ = this.copyObject(this.value_);
-      }
-
-    },
-
-    copyObject: function(object) {
-      var copy = Array.isArray(object) ? [] : {};
-      for (var prop in object) {
-        copy[prop] = object[prop];
-      };
-      if (Array.isArray(object))
-        copy.length = object.length;
-      return copy;
-    },
-
-    check_: function(changeRecords, skipChanges) {
-      var diff;
-      var oldValues;
-      if (hasObserve) {
-        if (!changeRecords)
-          return false;
-
-        oldValues = {};
-        diff = diffObjectFromChangeRecords(this.value_, changeRecords,
-                                           oldValues);
-      } else {
-        oldValues = this.oldObject_;
-        diff = diffObjectFromOldObject(this.value_, this.oldObject_);
-      }
-
-      if (diffIsEmpty(diff))
-        return false;
-
-      if (!hasObserve)
-        this.oldObject_ = this.copyObject(this.value_);
-
-      this.report_([
-        diff.added || {},
-        diff.removed || {},
-        diff.changed || {},
-        function(property) {
-          return oldValues[property];
-        }
-      ]);
-
-      return true;
-    },
-
-    disconnect_: function() {
-      if (hasObserve) {
-        this.directObserver_.close();
-        this.directObserver_ = undefined;
-      } else {
-        this.oldObject_ = undefined;
-      }
-    },
-
-    deliver: function() {
-      if (this.state_ != OPENED)
-        return;
-
-      if (hasObserve)
-        this.directObserver_.deliver(false);
-      else
-        dirtyCheck(this);
-    },
-
-    discardChanges: function() {
-      if (this.directObserver_)
-        this.directObserver_.deliver(true);
-      else
-        this.oldObject_ = this.copyObject(this.value_);
-
-      return this.value_;
-    }
-  });
-
-  function ArrayObserver(array) {
-    if (!Array.isArray(array))
-      throw Error('Provided object is not an Array');
-    ObjectObserver.call(this, array);
-  }
-
-  ArrayObserver.prototype = createObject({
-
-    __proto__: ObjectObserver.prototype,
-
-    arrayObserve: true,
-
-    copyObject: function(arr) {
-      return arr.slice();
-    },
-
-    check_: function(changeRecords) {
-      var splices;
-      if (hasObserve) {
-        if (!changeRecords)
-          return false;
-        splices = projectArraySplices(this.value_, changeRecords);
-      } else {
-        splices = calcSplices(this.value_, 0, this.value_.length,
-                              this.oldObject_, 0, this.oldObject_.length);
-      }
-
-      if (!splices || !splices.length)
-        return false;
-
-      if (!hasObserve)
-        this.oldObject_ = this.copyObject(this.value_);
-
-      this.report_([splices]);
-      return true;
-    }
-  });
-
-  ArrayObserver.applySplices = function(previous, current, splices) {
-    splices.forEach(function(splice) {
-      var spliceArgs = [splice.index, splice.removed.length];
-      var addIndex = splice.index;
-      while (addIndex < splice.index + splice.addedCount) {
-        spliceArgs.push(current[addIndex]);
-        addIndex++;
-      }
-
-      Array.prototype.splice.apply(previous, spliceArgs);
-    });
-  };
-
-  function PathObserver(object, path) {
-    Observer.call(this);
-
-    this.object_ = object;
-    this.path_ = getPath(path);
-    this.directObserver_ = undefined;
-  }
-
-  PathObserver.prototype = createObject({
-    __proto__: Observer.prototype,
-
-    get path() {
-      return this.path_;
-    },
-
-    connect_: function() {
-      if (hasObserve)
-        this.directObserver_ = getObservedSet(this, this.object_);
-
-      this.check_(undefined, true);
-    },
-
-    disconnect_: function() {
-      this.value_ = undefined;
-
-      if (this.directObserver_) {
-        this.directObserver_.close(this);
-        this.directObserver_ = undefined;
-      }
-    },
-
-    iterateObjects_: function(observe) {
-      this.path_.iterateObjects(this.object_, observe);
-    },
-
-    check_: function(changeRecords, skipChanges) {
-      var oldValue = this.value_;
-      this.value_ = this.path_.getValueFrom(this.object_);
-      if (skipChanges || areSameValue(this.value_, oldValue))
-        return false;
-
-      this.report_([this.value_, oldValue, this]);
-      return true;
-    },
-
-    setValue: function(newValue) {
-      if (this.path_)
-        this.path_.setValueFrom(this.object_, newValue);
-    }
-  });
-
-  function CompoundObserver(reportChangesOnOpen) {
-    Observer.call(this);
-
-    this.reportChangesOnOpen_ = reportChangesOnOpen;
-    this.value_ = [];
-    this.directObserver_ = undefined;
-    this.observed_ = [];
-  }
-
-  var observerSentinel = {};
-
-  CompoundObserver.prototype = createObject({
-    __proto__: Observer.prototype,
-
-    connect_: function() {
-      if (hasObserve) {
-        var object;
-        var needsDirectObserver = false;
-        for (var i = 0; i < this.observed_.length; i += 2) {
-          object = this.observed_[i]
-          if (object !== observerSentinel) {
-            needsDirectObserver = true;
-            break;
-          }
-        }
-
-        if (needsDirectObserver)
-          this.directObserver_ = getObservedSet(this, object);
-      }
-
-      this.check_(undefined, !this.reportChangesOnOpen_);
-    },
-
-    disconnect_: function() {
-      for (var i = 0; i < this.observed_.length; i += 2) {
-        if (this.observed_[i] === observerSentinel)
-          this.observed_[i + 1].close();
-      }
-      this.observed_.length = 0;
-      this.value_.length = 0;
-
-      if (this.directObserver_) {
-        this.directObserver_.close(this);
-        this.directObserver_ = undefined;
-      }
-    },
-
-    addPath: function(object, path) {
-      if (this.state_ != UNOPENED && this.state_ != RESETTING)
-        throw Error('Cannot add paths once started.');
-
-      var path = getPath(path);
-      this.observed_.push(object, path);
-      if (!this.reportChangesOnOpen_)
-        return;
-      var index = this.observed_.length / 2 - 1;
-      this.value_[index] = path.getValueFrom(object);
-    },
-
-    addObserver: function(observer) {
-      if (this.state_ != UNOPENED && this.state_ != RESETTING)
-        throw Error('Cannot add observers once started.');
-
-      this.observed_.push(observerSentinel, observer);
-      if (!this.reportChangesOnOpen_)
-        return;
-      var index = this.observed_.length / 2 - 1;
-      this.value_[index] = observer.open(this.deliver, this);
-    },
-
-    startReset: function() {
-      if (this.state_ != OPENED)
-        throw Error('Can only reset while open');
-
-      this.state_ = RESETTING;
-      this.disconnect_();
-    },
-
-    finishReset: function() {
-      if (this.state_ != RESETTING)
-        throw Error('Can only finishReset after startReset');
-      this.state_ = OPENED;
-      this.connect_();
-
-      return this.value_;
-    },
-
-    iterateObjects_: function(observe) {
-      var object;
-      for (var i = 0; i < this.observed_.length; i += 2) {
-        object = this.observed_[i]
-        if (object !== observerSentinel)
-          this.observed_[i + 1].iterateObjects(object, observe)
-      }
-    },
-
-    check_: function(changeRecords, skipChanges) {
-      var oldValues;
-      for (var i = 0; i < this.observed_.length; i += 2) {
-        var object = this.observed_[i];
-        var path = this.observed_[i+1];
-        var value;
-        if (object === observerSentinel) {
-          var observable = path;
-          value = this.state_ === UNOPENED ?
-              observable.open(this.deliver, this) :
-              observable.discardChanges();
-        } else {
-          value = path.getValueFrom(object);
-        }
-
-        if (skipChanges) {
-          this.value_[i / 2] = value;
-          continue;
-        }
-
-        if (areSameValue(value, this.value_[i / 2]))
-          continue;
-
-        oldValues = oldValues || [];
-        oldValues[i / 2] = this.value_[i / 2];
-        this.value_[i / 2] = value;
-      }
-
-      if (!oldValues)
-        return false;
-
-      // TODO(rafaelw): Having observed_ as the third callback arg here is
-      // pretty lame API. Fix.
-      this.report_([this.value_, oldValues, this.observed_]);
-      return true;
-    }
-  });
-
-  function identFn(value) { return value; }
-
-  function ObserverTransform(observable, getValueFn, setValueFn,
-                             dontPassThroughSet) {
-    this.callback_ = undefined;
-    this.target_ = undefined;
-    this.value_ = undefined;
-    this.observable_ = observable;
-    this.getValueFn_ = getValueFn || identFn;
-    this.setValueFn_ = setValueFn || identFn;
-    // TODO(rafaelw): This is a temporary hack. PolymerExpressions needs this
-    // at the moment because of a bug in it's dependency tracking.
-    this.dontPassThroughSet_ = dontPassThroughSet;
-  }
-
-  ObserverTransform.prototype = {
-    open: function(callback, target) {
-      this.callback_ = callback;
-      this.target_ = target;
-      this.value_ =
-          this.getValueFn_(this.observable_.open(this.observedCallback_, this));
-      return this.value_;
-    },
-
-    observedCallback_: function(value) {
-      value = this.getValueFn_(value);
-      if (areSameValue(value, this.value_))
-        return;
-      var oldValue = this.value_;
-      this.value_ = value;
-      this.callback_.call(this.target_, this.value_, oldValue);
-    },
-
-    discardChanges: function() {
-      this.value_ = this.getValueFn_(this.observable_.discardChanges());
-      return this.value_;
-    },
-
-    deliver: function() {
-      return this.observable_.deliver();
-    },
-
-    setValue: function(value) {
-      value = this.setValueFn_(value);
-      if (!this.dontPassThroughSet_ && this.observable_.setValue)
-        return this.observable_.setValue(value);
-    },
-
-    close: function() {
-      if (this.observable_)
-        this.observable_.close();
-      this.callback_ = undefined;
-      this.target_ = undefined;
-      this.observable_ = undefined;
-      this.value_ = undefined;
-      this.getValueFn_ = undefined;
-      this.setValueFn_ = undefined;
-    }
-  }
-
-  var expectedRecordTypes = {
-    add: true,
-    update: true,
-    delete: true
-  };
-
-  function diffObjectFromChangeRecords(object, changeRecords, oldValues) {
-    var added = {};
-    var removed = {};
-
-    for (var i = 0; i < changeRecords.length; i++) {
-      var record = changeRecords[i];
-      if (!expectedRecordTypes[record.type]) {
-        console.error('Unknown changeRecord type: ' + record.type);
-        console.error(record);
-        continue;
-      }
-
-      if (!(record.name in oldValues))
-        oldValues[record.name] = record.oldValue;
-
-      if (record.type == 'update')
-        continue;
-
-      if (record.type == 'add') {
-        if (record.name in removed)
-          delete removed[record.name];
-        else
-          added[record.name] = true;
-
-        continue;
-      }
-
-      // type = 'delete'
-      if (record.name in added) {
-        delete added[record.name];
-        delete oldValues[record.name];
-      } else {
-        removed[record.name] = true;
-      }
-    }
-
-    for (var prop in added)
-      added[prop] = object[prop];
-
-    for (var prop in removed)
-      removed[prop] = undefined;
-
-    var changed = {};
-    for (var prop in oldValues) {
-      if (prop in added || prop in removed)
-        continue;
-
-      var newValue = object[prop];
-      if (oldValues[prop] !== newValue)
-        changed[prop] = newValue;
-    }
-
-    return {
-      added: added,
-      removed: removed,
-      changed: changed
-    };
-  }
-
-  function newSplice(index, removed, addedCount) {
-    return {
-      index: index,
-      removed: removed,
-      addedCount: addedCount
-    };
-  }
-
-  var EDIT_LEAVE = 0;
-  var EDIT_UPDATE = 1;
-  var EDIT_ADD = 2;
-  var EDIT_DELETE = 3;
-
-  function ArraySplice() {}
-
-  ArraySplice.prototype = {
-
-    // Note: This function is *based* on the computation of the Levenshtein
-    // "edit" distance. The one change is that "updates" are treated as two
-    // edits - not one. With Array splices, an update is really a delete
-    // followed by an add. By retaining this, we optimize for "keeping" the
-    // maximum array items in the original array. For example:
-    //
-    //   'xxxx123' -> '123yyyy'
-    //
-    // With 1-edit updates, the shortest path would be just to update all seven
-    // characters. With 2-edit updates, we delete 4, leave 3, and add 4. This
-    // leaves the substring '123' intact.
-    calcEditDistances: function(current, currentStart, currentEnd,
-                                old, oldStart, oldEnd) {
-      // "Deletion" columns
-      var rowCount = oldEnd - oldStart + 1;
-      var columnCount = currentEnd - currentStart + 1;
-      var distances = new Array(rowCount);
-
-      // "Addition" rows. Initialize null column.
-      for (var i = 0; i < rowCount; i++) {
-        distances[i] = new Array(columnCount);
-        distances[i][0] = i;
-      }
-
-      // Initialize null row
-      for (var j = 0; j < columnCount; j++)
-        distances[0][j] = j;
-
-      for (var i = 1; i < rowCount; i++) {
-        for (var j = 1; j < columnCount; j++) {
-          if (this.equals(current[currentStart + j - 1], old[oldStart + i - 1]))
-            distances[i][j] = distances[i - 1][j - 1];
-          else {
-            var north = distances[i - 1][j] + 1;
-            var west = distances[i][j - 1] + 1;
-            distances[i][j] = north < west ? north : west;
-          }
-        }
-      }
-
-      return distances;
-    },
-
-    // This starts at the final weight, and walks "backward" by finding
-    // the minimum previous weight recursively until the origin of the weight
-    // matrix.
-    spliceOperationsFromEditDistances: function(distances) {
-      var i = distances.length - 1;
-      var j = distances[0].length - 1;
-      var current = distances[i][j];
-      var edits = [];
-      while (i > 0 || j > 0) {
-        if (i == 0) {
-          edits.push(EDIT_ADD);
-          j--;
-          continue;
-        }
-        if (j == 0) {
-          edits.push(EDIT_DELETE);
-          i--;
-          continue;
-        }
-        var northWest = distances[i - 1][j - 1];
-        var west = distances[i - 1][j];
-        var north = distances[i][j - 1];
-
-        var min;
-        if (west < north)
-          min = west < northWest ? west : northWest;
-        else
-          min = north < northWest ? north : northWest;
-
-        if (min == northWest) {
-          if (northWest == current) {
-            edits.push(EDIT_LEAVE);
-          } else {
-            edits.push(EDIT_UPDATE);
-            current = northWest;
-          }
-          i--;
-          j--;
-        } else if (min == west) {
-          edits.push(EDIT_DELETE);
-          i--;
-          current = west;
-        } else {
-          edits.push(EDIT_ADD);
-          j--;
-          current = north;
-        }
-      }
-
-      edits.reverse();
-      return edits;
-    },
-
-    /**
-     * Splice Projection functions:
-     *
-     * A splice map is a representation of how a previous array of items
-     * was transformed into a new array of items. Conceptually it is a list of
-     * tuples of
-     *
-     *   <index, removed, addedCount>
-     *
-     * which are kept in ascending index order of. The tuple represents that at
-     * the |index|, |removed| sequence of items were removed, and counting forward
-     * from |index|, |addedCount| items were added.
-     */
-
-    /**
-     * Lacking individual splice mutation information, the minimal set of
-     * splices can be synthesized given the previous state and final state of an
-     * array. The basic approach is to calculate the edit distance matrix and
-     * choose the shortest path through it.
-     *
-     * Complexity: O(l * p)
-     *   l: The length of the current array
-     *   p: The length of the old array
-     */
-    calcSplices: function(current, currentStart, currentEnd,
-                          old, oldStart, oldEnd) {
-      var prefixCount = 0;
-      var suffixCount = 0;
-
-      var minLength = Math.min(currentEnd - currentStart, oldEnd - oldStart);
-      if (currentStart == 0 && oldStart == 0)
-        prefixCount = this.sharedPrefix(current, old, minLength);
-
-      if (currentEnd == current.length && oldEnd == old.length)
-        suffixCount = this.sharedSuffix(current, old, minLength - prefixCount);
-
-      currentStart += prefixCount;
-      oldStart += prefixCount;
-      currentEnd -= suffixCount;
-      oldEnd -= suffixCount;
-
-      if (currentEnd - currentStart == 0 && oldEnd - oldStart == 0)
-        return [];
-
-      if (currentStart == currentEnd) {
-        var splice = newSplice(currentStart, [], 0);
-        while (oldStart < oldEnd)
-          splice.removed.push(old[oldStart++]);
-
-        return [ splice ];
-      } else if (oldStart == oldEnd)
-        return [ newSplice(currentStart, [], currentEnd - currentStart) ];
-
-      var ops = this.spliceOperationsFromEditDistances(
-          this.calcEditDistances(current, currentStart, currentEnd,
-                                 old, oldStart, oldEnd));
-
-      var splice = undefined;
-      var splices = [];
-      var index = currentStart;
-      var oldIndex = oldStart;
-      for (var i = 0; i < ops.length; i++) {
-        switch(ops[i]) {
-          case EDIT_LEAVE:
-            if (splice) {
-              splices.push(splice);
-              splice = undefined;
-            }
-
-            index++;
-            oldIndex++;
-            break;
-          case EDIT_UPDATE:
-            if (!splice)
-              splice = newSplice(index, [], 0);
-
-            splice.addedCount++;
-            index++;
-
-            splice.removed.push(old[oldIndex]);
-            oldIndex++;
-            break;
-          case EDIT_ADD:
-            if (!splice)
-              splice = newSplice(index, [], 0);
-
-            splice.addedCount++;
-            index++;
-            break;
-          case EDIT_DELETE:
-            if (!splice)
-              splice = newSplice(index, [], 0);
-
-            splice.removed.push(old[oldIndex]);
-            oldIndex++;
-            break;
-        }
-      }
-
-      if (splice) {
-        splices.push(splice);
-      }
-      return splices;
-    },
-
-    sharedPrefix: function(current, old, searchLength) {
-      for (var i = 0; i < searchLength; i++)
-        if (!this.equals(current[i], old[i]))
-          return i;
-      return searchLength;
-    },
-
-    sharedSuffix: function(current, old, searchLength) {
-      var index1 = current.length;
-      var index2 = old.length;
-      var count = 0;
-      while (count < searchLength && this.equals(current[--index1], old[--index2]))
-        count++;
-
-      return count;
-    },
-
-    calculateSplices: function(current, previous) {
-      return this.calcSplices(current, 0, current.length, previous, 0,
-                              previous.length);
-    },
-
-    equals: function(currentValue, previousValue) {
-      return currentValue === previousValue;
-    }
-  };
-
-  var arraySplice = new ArraySplice();
-
-  function calcSplices(current, currentStart, currentEnd,
-                       old, oldStart, oldEnd) {
-    return arraySplice.calcSplices(current, currentStart, currentEnd,
-                                   old, oldStart, oldEnd);
-  }
-
-  function intersect(start1, end1, start2, end2) {
-    // Disjoint
-    if (end1 < start2 || end2 < start1)
-      return -1;
-
-    // Adjacent
-    if (end1 == start2 || end2 == start1)
-      return 0;
-
-    // Non-zero intersect, span1 first
-    if (start1 < start2) {
-      if (end1 < end2)
-        return end1 - start2; // Overlap
-      else
-        return end2 - start2; // Contained
-    } else {
-      // Non-zero intersect, span2 first
-      if (end2 < end1)
-        return end2 - start1; // Overlap
-      else
-        return end1 - start1; // Contained
-    }
-  }
-
-  function mergeSplice(splices, index, removed, addedCount) {
-
-    var splice = newSplice(index, removed, addedCount);
-
-    var inserted = false;
-    var insertionOffset = 0;
-
-    for (var i = 0; i < splices.length; i++) {
-      var current = splices[i];
-      current.index += insertionOffset;
-
-      if (inserted)
-        continue;
-
-      var intersectCount = intersect(splice.index,
-                                     splice.index + splice.removed.length,
-                                     current.index,
-                                     current.index + current.addedCount);
-
-      if (intersectCount >= 0) {
-        // Merge the two splices
-
-        splices.splice(i, 1);
-        i--;
-
-        insertionOffset -= current.addedCount - current.removed.length;
-
-        splice.addedCount += current.addedCount - intersectCount;
-        var deleteCount = splice.removed.length +
-                          current.removed.length - intersectCount;
-
-        if (!splice.addedCount && !deleteCount) {
-          // merged splice is a noop. discard.
-          inserted = true;
-        } else {
-          var removed = current.removed;
-
-          if (splice.index < current.index) {
-            // some prefix of splice.removed is prepended to current.removed.
-            var prepend = splice.removed.slice(0, current.index - splice.index);
-            Array.prototype.push.apply(prepend, removed);
-            removed = prepend;
-          }
-
-          if (splice.index + splice.removed.length > current.index + current.addedCount) {
-            // some suffix of splice.removed is appended to current.removed.
-            var append = splice.removed.slice(current.index + current.addedCount - splice.index);
-            Array.prototype.push.apply(removed, append);
-          }
-
-          splice.removed = removed;
-          if (current.index < splice.index) {
-            splice.index = current.index;
-          }
-        }
-      } else if (splice.index < current.index) {
-        // Insert splice here.
-
-        inserted = true;
-
-        splices.splice(i, 0, splice);
-        i++;
-
-        var offset = splice.addedCount - splice.removed.length
-        current.index += offset;
-        insertionOffset += offset;
-      }
-    }
-
-    if (!inserted)
-      splices.push(splice);
-  }
-
-  function createInitialSplices(array, changeRecords) {
-    var splices = [];
-
-    for (var i = 0; i < changeRecords.length; i++) {
-      var record = changeRecords[i];
-      switch(record.type) {
-        case 'splice':
-          mergeSplice(splices, record.index, record.removed.slice(), record.addedCount);
-          break;
-        case 'add':
-        case 'update':
-        case 'delete':
-          if (!isIndex(record.name))
-            continue;
-          var index = toNumber(record.name);
-          if (index < 0)
-            continue;
-          mergeSplice(splices, index, [record.oldValue], 1);
-          break;
-        default:
-          console.error('Unexpected record type: ' + JSON.stringify(record));
-          break;
-      }
-    }
-
-    return splices;
-  }
-
-  function projectArraySplices(array, changeRecords) {
-    var splices = [];
-
-    createInitialSplices(array, changeRecords).forEach(function(splice) {
-      if (splice.addedCount == 1 && splice.removed.length == 1) {
-        if (splice.removed[0] !== array[splice.index])
-          splices.push(splice);
-
-        return
-      };
-
-      splices = splices.concat(calcSplices(array, splice.index, splice.index + splice.addedCount,
-                                           splice.removed, 0, splice.removed.length));
-    });
-
-    return splices;
-  }
-
-  // Export the observe-js object for **Node.js**, with backwards-compatibility
-  // for the old `require()` API. Also ensure `exports` is not a DOM Element.
-  // If we're in the browser, export as a global object.
-
-  var expose = global;
-
-  if (typeof exports !== 'undefined' && !exports.nodeType) {
-    if (typeof module !== 'undefined' && module.exports) {
-      exports = module.exports;
-    }
-    expose = exports;
-  }
-
-  expose.Observer = Observer;
-  expose.Observer.runEOM_ = runEOM;
-  expose.Observer.observerSentinel_ = observerSentinel; // for testing.
-  expose.Observer.hasObjectObserve = hasObserve;
-  expose.ArrayObserver = ArrayObserver;
-  expose.ArrayObserver.calculateSplices = function(current, previous) {
-    return arraySplice.calculateSplices(current, previous);
-  };
-
-  expose.ArraySplice = ArraySplice;
-  expose.ObjectObserver = ObjectObserver;
-  expose.PathObserver = PathObserver;
-  expose.CompoundObserver = CompoundObserver;
-  expose.Path = Path;
-  expose.ObserverTransform = ObserverTransform;
-  
-})(typeof global !== 'undefined' && global && typeof module !== 'undefined' && module ? global : this || window);
-
-// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-// Code distributed by Google as part of the polymer project is also
-// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-
-(function(global) {
-  'use strict';
-
-  var filter = Array.prototype.filter.call.bind(Array.prototype.filter);
-
-  function getTreeScope(node) {
-    while (node.parentNode) {
-      node = node.parentNode;
-    }
-
-    return typeof node.getElementById === 'function' ? node : null;
-  }
-
-  Node.prototype.bind = function(name, observable) {
-    console.error('Unhandled binding to Node: ', this, name, observable);
-  };
-
-  Node.prototype.bindFinished = function() {};
-
-  function updateBindings(node, name, binding) {
-    var bindings = node.bindings_;
-    if (!bindings)
-      bindings = node.bindings_ = {};
-
-    if (bindings[name])
-      binding[name].close();
-
-    return bindings[name] = binding;
-  }
-
-  function returnBinding(node, name, binding) {
-    return binding;
-  }
-
-  function sanitizeValue(value) {
-    return value == null ? '' : value;
-  }
-
-  function updateText(node, value) {
-    node.data = sanitizeValue(value);
-  }
-
-  function textBinding(node) {
-    return function(value) {
-      return updateText(node, value);
-    };
-  }
-
-  var maybeUpdateBindings = returnBinding;
-
-  Object.defineProperty(Platform, 'enableBindingsReflection', {
-    get: function() {
-      return maybeUpdateBindings === updateBindings;
-    },
-    set: function(enable) {
-      maybeUpdateBindings = enable ? updateBindings : returnBinding;
-      return enable;
-    },
-    configurable: true
-  });
-
-  Text.prototype.bind = function(name, value, oneTime) {
-    if (name !== 'textContent')
-      return Node.prototype.bind.call(this, name, value, oneTime);
-
-    if (oneTime)
-      return updateText(this, value);
-
-    var observable = value;
-    updateText(this, observable.open(textBinding(this)));
-    return maybeUpdateBindings(this, name, observable);
-  }
-
-  function updateAttribute(el, name, conditional, value) {
-    if (conditional) {
-      if (value)
-        el.setAttribute(name, '');
-      else
-        el.removeAttribute(name);
-      return;
-    }
-
-    el.setAttribute(name, sanitizeValue(value));
-  }
-
-  function attributeBinding(el, name, conditional) {
-    return function(value) {
-      updateAttribute(el, name, conditional, value);
-    };
-  }
-
-  Element.prototype.bind = function(name, value, oneTime) {
-    var conditional = name[name.length - 1] == '?';
-    if (conditional) {
-      this.removeAttribute(name);
-      name = name.slice(0, -1);
-    }
-
-    if (oneTime)
-      return updateAttribute(this, name, conditional, value);
-
-
-    var observable = value;
-    updateAttribute(this, name, conditional,
-        observable.open(attributeBinding(this, name, conditional)));
-
-    return maybeUpdateBindings(this, name, observable);
-  };
-
-  var checkboxEventType;
-  (function() {
-    // Attempt to feature-detect which event (change or click) is fired first
-    // for checkboxes.
-    var div = document.createElement('div');
-    var checkbox = div.appendChild(document.createElement('input'));
-    checkbox.setAttribute('type', 'checkbox');
-    var first;
-    var count = 0;
-    checkbox.addEventListener('click', function(e) {
-      count++;
-      first = first || 'click';
-    });
-    checkbox.addEventListener('change', function() {
-      count++;
-      first = first || 'change';
-    });
-
-    var event = document.createEvent('MouseEvent');
-    event.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false,
-        false, false, false, 0, null);
-    checkbox.dispatchEvent(event);
-    // WebKit/Blink don't fire the change event if the element is outside the
-    // document, so assume 'change' for that case.
-    checkboxEventType = count == 1 ? 'change' : first;
-  })();
-
-  function getEventForInputType(element) {
-    switch (element.type) {
-      case 'checkbox':
-        return checkboxEventType;
-      case 'radio':
-      case 'select-multiple':
-      case 'select-one':
-        return 'change';
-      case 'range':
-        if (/Trident|MSIE/.test(navigator.userAgent))
-          return 'change';
-      default:
-        return 'input';
-    }
-  }
-
-  function updateInput(input, property, value, santizeFn) {
-    input[property] = (santizeFn || sanitizeValue)(value);
-  }
-
-  function inputBinding(input, property, santizeFn) {
-    return function(value) {
-      return updateInput(input, property, value, santizeFn);
-    }
-  }
-
-  function noop() {}
-
-  function bindInputEvent(input, property, observable, postEventFn) {
-    var eventType = getEventForInputType(input);
-
-    function eventHandler() {
-      var isNum = property == 'value' && input.type == 'number';
-      observable.setValue(isNum ? input.valueAsNumber : input[property]);
-      observable.discardChanges();
-      (postEventFn || noop)(input);
-      Platform.performMicrotaskCheckpoint();
-    }
-    input.addEventListener(eventType, eventHandler);
-
-    return {
-      close: function() {
-        input.removeEventListener(eventType, eventHandler);
-        observable.close();
-      },
-
-      observable_: observable
-    }
-  }
-
-  function booleanSanitize(value) {
-    return Boolean(value);
-  }
-
-  // |element| is assumed to be an HTMLInputElement with |type| == 'radio'.
-  // Returns an array containing all radio buttons other than |element| that
-  // have the same |name|, either in the form that |element| belongs to or,
-  // if no form, in the document tree to which |element| belongs.
-  //
-  // This implementation is based upon the HTML spec definition of a
-  // "radio button group":
-  //   http://www.whatwg.org/specs/web-apps/current-work/multipage/number-state.html#radio-button-group
-  //
-  function getAssociatedRadioButtons(element) {
-    if (element.form) {
-      return filter(element.form.elements, function(el) {
-        return el != element &&
-            el.tagName == 'INPUT' &&
-            el.type == 'radio' &&
-            el.name == element.name;
-      });
-    } else {
-      var treeScope = getTreeScope(element);
-      if (!treeScope)
-        return [];
-      var radios = treeScope.querySelectorAll(
-          'input[type="radio"][name="' + element.name + '"]');
-      return filter(radios, function(el) {
-        return el != element && !el.form;
-      });
-    }
-  }
-
-  function checkedPostEvent(input) {
-    // Only the radio button that is getting checked gets an event. We
-    // therefore find all the associated radio buttons and update their
-    // check binding manually.
-    if (input.tagName === 'INPUT' &&
-        input.type === 'radio') {
-      getAssociatedRadioButtons(input).forEach(function(radio) {
-        var checkedBinding = radio.bindings_.checked;
-        if (checkedBinding) {
-          // Set the value directly to avoid an infinite call stack.
-          checkedBinding.observable_.setValue(false);
-        }
-      });
-    }
-  }
-
-  HTMLInputElement.prototype.bind = function(name, value, oneTime) {
-    if (name !== 'value' && name !== 'checked')
-      return HTMLElement.prototype.bind.call(this, name, value, oneTime);
-
-    this.removeAttribute(name);
-    var sanitizeFn = name == 'checked' ? booleanSanitize : sanitizeValue;
-    var postEventFn = name == 'checked' ? checkedPostEvent : noop;
-
-    if (oneTime)
-      return updateInput(this, name, value, sanitizeFn);
-
-
-    var observable = value;
-    var binding = bindInputEvent(this, name, observable, postEventFn);
-    updateInput(this, name,
-                observable.open(inputBinding(this, name, sanitizeFn)),
-                sanitizeFn);
-
-    // Checkboxes may need to update bindings of other checkboxes.
-    return updateBindings(this, name, binding);
-  }
-
-  HTMLTextAreaElement.prototype.bind = function(name, value, oneTime) {
-    if (name !== 'value')
-      return HTMLElement.prototype.bind.call(this, name, value, oneTime);
-
-    this.removeAttribute('value');
-
-    if (oneTime)
-      return updateInput(this, 'value', value);
-
-    var observable = value;
-    var binding = bindInputEvent(this, 'value', observable);
-    updateInput(this, 'value',
-                observable.open(inputBinding(this, 'value', sanitizeValue)));
-    return maybeUpdateBindings(this, name, binding);
-  }
-
-  function updateOption(option, value) {
-    var parentNode = option.parentNode;;
-    var select;
-    var selectBinding;
-    var oldValue;
-    if (parentNode instanceof HTMLSelectElement &&
-        parentNode.bindings_ &&
-        parentNode.bindings_.value) {
-      select = parentNode;
-      selectBinding = select.bindings_.value;
-      oldValue = select.value;
-    }
-
-    option.value = sanitizeValue(value);
-
-    if (select && select.value != oldValue) {
-      selectBinding.observable_.setValue(select.value);
-      selectBinding.observable_.discardChanges();
-      Platform.performMicrotaskCheckpoint();
-    }
-  }
-
-  function optionBinding(option) {
-    return function(value) {
-      updateOption(option, value);
-    }
-  }
-
-  HTMLOptionElement.prototype.bind = function(name, value, oneTime) {
-    if (name !== 'value')
-      return HTMLElement.prototype.bind.call(this, name, value, oneTime);
-
-    this.removeAttribute('value');
-
-    if (oneTime)
-      return updateOption(this, value);
-
-    var observable = value;
-    var binding = bindInputEvent(this, 'value', observable);
-    updateOption(this, observable.open(optionBinding(this)));
-    return maybeUpdateBindings(this, name, binding);
-  }
-
-  HTMLSelectElement.prototype.bind = function(name, value, oneTime) {
-    if (name === 'selectedindex')
-      name = 'selectedIndex';
-
-    if (name !== 'selectedIndex' && name !== 'value')
-      return HTMLElement.prototype.bind.call(this, name, value, oneTime);
-
-    this.removeAttribute(name);
-
-    if (oneTime)
-      return updateInput(this, name, value);
-
-    var observable = value;
-    var binding = bindInputEvent(this, name, observable);
-    updateInput(this, name,
-                observable.open(inputBinding(this, name)));
-
-    // Option update events may need to access select bindings.
-    return updateBindings(this, name, binding);
-  }
-})(this);
-
-// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-// Code distributed by Google as part of the polymer project is also
-// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-
-(function(global) {
-  'use strict';
-
-  function assert(v) {
-    if (!v)
-      throw new Error('Assertion failed');
-  }
-
-  var forEach = Array.prototype.forEach.call.bind(Array.prototype.forEach);
-
-  function getFragmentRoot(node) {
-    var p;
-    while (p = node.parentNode) {
-      node = p;
-    }
-
-    return node;
-  }
-
-  function searchRefId(node, id) {
-    if (!id)
-      return;
-
-    var ref;
-    var selector = '#' + id;
-    while (!ref) {
-      node = getFragmentRoot(node);
-
-      if (node.protoContent_)
-        ref = node.protoContent_.querySelector(selector);
-      else if (node.getElementById)
-        ref = node.getElementById(id);
-
-      if (ref || !node.templateCreator_)
-        break
-
-      node = node.templateCreator_;
-    }
-
-    return ref;
-  }
-
-  function getInstanceRoot(node) {
-    while (node.parentNode) {
-      node = node.parentNode;
-    }
-    return node.templateCreator_ ? node : null;
-  }
-
-  var Map;
-  if (global.Map && typeof global.Map.prototype.forEach === 'function') {
-    Map = global.Map;
-  } else {
-    Map = function() {
-      this.keys = [];
-      this.values = [];
-    };
-
-    Map.prototype = {
-      set: function(key, value) {
-        var index = this.keys.indexOf(key);
-        if (index < 0) {
-          this.keys.push(key);
-          this.values.push(value);
-        } else {
-          this.values[index] = value;
-        }
-      },
-
-      get: function(key) {
-        var index = this.keys.indexOf(key);
-        if (index < 0)
-          return;
-
-        return this.values[index];
-      },
-
-      delete: function(key, value) {
-        var index = this.keys.indexOf(key);
-        if (index < 0)
-          return false;
-
-        this.keys.splice(index, 1);
-        this.values.splice(index, 1);
-        return true;
-      },
-
-      forEach: function(f, opt_this) {
-        for (var i = 0; i < this.keys.length; i++)
-          f.call(opt_this || this, this.values[i], this.keys[i], this);
-      }
-    };
-  }
-
-  // JScript does not have __proto__. We wrap all object literals with
-  // createObject which uses Object.create, Object.defineProperty and
-  // Object.getOwnPropertyDescriptor to create a new object that does the exact
-  // same thing. The main downside to this solution is that we have to extract
-  // all those property descriptors for IE.
-  var createObject = ('__proto__' in {}) ?
-      function(obj) { return obj; } :
-      function(obj) {
-        var proto = obj.__proto__;
-        if (!proto)
-          return obj;
-        var newObject = Object.create(proto);
-        Object.getOwnPropertyNames(obj).forEach(function(name) {
-          Object.defineProperty(newObject, name,
-                               Object.getOwnPropertyDescriptor(obj, name));
-        });
-        return newObject;
-      };
-
-  // IE does not support have Document.prototype.contains.
-  if (typeof document.contains != 'function') {
-    Document.prototype.contains = function(node) {
-      if (node === this || node.parentNode === this)
-        return true;
-      return this.documentElement.contains(node);
-    }
-  }
-
-  var BIND = 'bind';
-  var REPEAT = 'repeat';
-  var IF = 'if';
-
-  var templateAttributeDirectives = {
-    'template': true,
-    'repeat': true,
-    'bind': true,
-    'ref': true,
-    'if': true
-  };
-
-  var semanticTemplateElements = {
-    'THEAD': true,
-    'TBODY': true,
-    'TFOOT': true,
-    'TH': true,
-    'TR': true,
-    'TD': true,
-    'COLGROUP': true,
-    'COL': true,
-    'CAPTION': true,
-    'OPTION': true,
-    'OPTGROUP': true
-  };
-
-  var hasTemplateElement = typeof HTMLTemplateElement !== 'undefined';
-  if (hasTemplateElement) {
-    // TODO(rafaelw): Remove when fix for
-    // https://codereview.chromium.org/164803002/
-    // makes it to Chrome release.
-    (function() {
-      var t = document.createElement('template');
-      var d = t.content.ownerDocument;
-      var html = d.appendChild(d.createElement('html'));
-      var head = html.appendChild(d.createElement('head'));
-      var base = d.createElement('base');
-      base.href = document.baseURI;
-      head.appendChild(base);
-    })();
-  }
-
-  var allTemplatesSelectors = 'template, ' +
-      Object.keys(semanticTemplateElements).map(function(tagName) {
-        return tagName.toLowerCase() + '[template]';
-      }).join(', ');
-
-  function isSVGTemplate(el) {
-    return el.tagName == 'template' &&
-           el.namespaceURI == 'http://www.w3.org/2000/svg';
-  }
-
-  function isHTMLTemplate(el) {
-    return el.tagName == 'TEMPLATE' &&
-           el.namespaceURI == 'http://www.w3.org/1999/xhtml';
-  }
-
-  function isAttributeTemplate(el) {
-    return Boolean(semanticTemplateElements[el.tagName] &&
-                   el.hasAttribute('template'));
-  }
-
-  function isTemplate(el) {
-    if (el.isTemplate_ === undefined)
-      el.isTemplate_ = el.tagName == 'TEMPLATE' || isAttributeTemplate(el);
-
-    return el.isTemplate_;
-  }
-
-  // FIXME: Observe templates being added/removed from documents
-  // FIXME: Expose imperative API to decorate and observe templates in
-  // "disconnected tress" (e.g. ShadowRoot)
-  document.addEventListener('DOMContentLoaded', function(e) {
-    bootstrapTemplatesRecursivelyFrom(document);
-    // FIXME: Is this needed? Seems like it shouldn't be.
-    Platform.performMicrotaskCheckpoint();
-  }, false);
-
-  function forAllTemplatesFrom(node, fn) {
-    var subTemplates = node.querySelectorAll(allTemplatesSelectors);
-
-    if (isTemplate(node))
-      fn(node)
-    forEach(subTemplates, fn);
-  }
-
-  function bootstrapTemplatesRecursivelyFrom(node) {
-    function bootstrap(template) {
-      if (!HTMLTemplateElement.decorate(template))
-        bootstrapTemplatesRecursivelyFrom(template.content);
-    }
-
-    forAllTemplatesFrom(node, bootstrap);
-  }
-
-  if (!hasTemplateElement) {
-    /**
-     * This represents a <template> element.
-     * @constructor
-     * @extends {HTMLElement}
-     */
-    global.HTMLTemplateElement = function() {
-      throw TypeError('Illegal constructor');
-    };
-  }
-
-  var hasProto = '__proto__' in {};
-
-  function mixin(to, from) {
-    Object.getOwnPropertyNames(from).forEach(function(name) {
-      Object.defineProperty(to, name,
-                            Object.getOwnPropertyDescriptor(from, name));
-    });
-  }
-
-  // http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/templates/index.html#dfn-template-contents-owner
-  function getOrCreateTemplateContentsOwner(template) {
-    var doc = template.ownerDocument
-    if (!doc.defaultView)
-      return doc;
-    var d = doc.templateContentsOwner_;
-    if (!d) {
-      // TODO(arv): This should either be a Document or HTMLDocument depending
-      // on doc.
-      d = doc.implementation.createHTMLDocument('');
-      while (d.lastChild) {
-        d.removeChild(d.lastChild);
-      }
-      doc.templateContentsOwner_ = d;
-    }
-    return d;
-  }
-
-  function getTemplateStagingDocument(template) {
-    if (!template.stagingDocument_) {
-      var owner = template.ownerDocument;
-      if (!owner.stagingDocument_) {
-        owner.stagingDocument_ = owner.implementation.createHTMLDocument('');
-        owner.stagingDocument_.isStagingDocument = true;
-        // TODO(rafaelw): Remove when fix for
-        // https://codereview.chromium.org/164803002/
-        // makes it to Chrome release.
-        var base = owner.stagingDocument_.createElement('base');
-        base.href = document.baseURI;
-        owner.stagingDocument_.head.appendChild(base);
-
-        owner.stagingDocument_.stagingDocument_ = owner.stagingDocument_;
-      }
-
-      template.stagingDocument_ = owner.stagingDocument_;
-    }
-
-    return template.stagingDocument_;
-  }
-
-  // For non-template browsers, the parser will disallow <template> in certain
-  // locations, so we allow "attribute templates" which combine the template
-  // element with the top-level container node of the content, e.g.
-  //
-  //   <tr template repeat="{{ foo }}"" class="bar"><td>Bar</td></tr>
-  //
-  // becomes
-  //
-  //   <template repeat="{{ foo }}">
-  //   + #document-fragment
-  //     + <tr class="bar">
-  //       + <td>Bar</td>
-  //
-  function extractTemplateFromAttributeTemplate(el) {
-    var template = el.ownerDocument.createElement('template');
-    el.parentNode.insertBefore(template, el);
-
-    var attribs = el.attributes;
-    var count = attribs.length;
-    while (count-- > 0) {
-      var attrib = attribs[count];
-      if (templateAttributeDirectives[attrib.name]) {
-        if (attrib.name !== 'template')
-          template.setAttribute(attrib.name, attrib.value);
-        el.removeAttribute(attrib.name);
-      }
-    }
-
-    return template;
-  }
-
-  function extractTemplateFromSVGTemplate(el) {
-    var template = el.ownerDocument.createElement('template');
-    el.parentNode.insertBefore(template, el);
-
-    var attribs = el.attributes;
-    var count = attribs.length;
-    while (count-- > 0) {
-      var attrib = attribs[count];
-      template.setAttribute(attrib.name, attrib.value);
-      el.removeAttribute(attrib.name);
-    }
-
-    el.parentNode.removeChild(el);
-    return template;
-  }
-
-  function liftNonNativeTemplateChildrenIntoContent(template, el, useRoot) {
-    var content = template.content;
-    if (useRoot) {
-      content.appendChild(el);
-      return;
-    }
-
-    var child;
-    while (child = el.firstChild) {
-      content.appendChild(child);
-    }
-  }
-
-  var templateObserver;
-  if (typeof MutationObserver == 'function') {
-    templateObserver = new MutationObserver(function(records) {
-      for (var i = 0; i < records.length; i++) {
-        records[i].target.refChanged_();
-      }
-    });
-  }
-
-  /**
-   * Ensures proper API and content model for template elements.
-   * @param {HTMLTemplateElement} opt_instanceRef The template element which
-   *     |el| template element will return as the value of its ref(), and whose
-   *     content will be used as source when createInstance() is invoked.
-   */
-  HTMLTemplateElement.decorate = function(el, opt_instanceRef) {
-    if (el.templateIsDecorated_)
-      return false;
-
-    var templateElement = el;
-    templateElement.templateIsDecorated_ = true;
-
-    var isNativeHTMLTemplate = isHTMLTemplate(templateElement) &&
-                               hasTemplateElement;
-    var bootstrapContents = isNativeHTMLTemplate;
-    var liftContents = !isNativeHTMLTemplate;
-    var liftRoot = false;
-
-    if (!isNativeHTMLTemplate) {
-      if (isAttributeTemplate(templateElement)) {
-        assert(!opt_instanceRef);
-        templateElement = extractTemplateFromAttributeTemplate(el);
-        templateElement.templateIsDecorated_ = true;
-        isNativeHTMLTemplate = hasTemplateElement;
-        liftRoot = true;
-      } else if (isSVGTemplate(templateElement)) {
-        templateElement = extractTemplateFromSVGTemplate(el);
-        templateElement.templateIsDecorated_ = true;
-        isNativeHTMLTemplate = hasTemplateElement;
-      }
-    }
-
-    if (!isNativeHTMLTemplate) {
-      fixTemplateElementPrototype(templateElement);
-      var doc = getOrCreateTemplateContentsOwner(templateElement);
-      templateElement.content_ = doc.createDocumentFragment();
-    }
-
-    if (opt_instanceRef) {
-      // template is contained within an instance, its direct content must be
-      // empty
-      templateElement.instanceRef_ = opt_instanceRef;
-    } else if (liftContents) {
-      liftNonNativeTemplateChildrenIntoContent(templateElement,
-                                               el,
-                                               liftRoot);
-    } else if (bootstrapContents) {
-      bootstrapTemplatesRecursivelyFrom(templateElement.content);
-    }
-
-    return true;
-  };
-
-  // TODO(rafaelw): This used to decorate recursively all templates from a given
-  // node. This happens by default on 'DOMContentLoaded', but may be needed
-  // in subtrees not descendent from document (e.g. ShadowRoot).
-  // Review whether this is the right public API.
-  HTMLTemplateElement.bootstrap = bootstrapTemplatesRecursivelyFrom;
-
-  var htmlElement = global.HTMLUnknownElement || HTMLElement;
-
-  var contentDescriptor = {
-    get: function() {
-      return this.content_;
-    },
-    enumerable: true,
-    configurable: true
-  };
-
-  if (!hasTemplateElement) {
-    // Gecko is more picky with the prototype than WebKit. Make sure to use the
-    // same prototype as created in the constructor.
-    HTMLTemplateElement.prototype = Object.create(htmlElement.prototype);
-
-    Object.defineProperty(HTMLTemplateElement.prototype, 'content',
-                          contentDescriptor);
-  }
-
-  function fixTemplateElementPrototype(el) {
-    if (hasProto)
-      el.__proto__ = HTMLTemplateElement.prototype;
-    else
-      mixin(el, HTMLTemplateElement.prototype);
-  }
-
-  function ensureSetModelScheduled(template) {
-    if (!template.setModelFn_) {
-      template.setModelFn_ = function() {
-        template.setModelFnScheduled_ = false;
-        var map = getBindings(template,
-            template.delegate_ && template.delegate_.prepareBinding);
-        processBindings(template, map, template.model_);
-      };
-    }
-
-    if (!template.setModelFnScheduled_) {
-      template.setModelFnScheduled_ = true;
-      Observer.runEOM_(template.setModelFn_);
-    }
-  }
-
-  mixin(HTMLTemplateElement.prototype, {
-    bind: function(name, value, oneTime) {
-      if (name != 'ref')
-        return Element.prototype.bind.call(this, name, value, oneTime);
-
-      var self = this;
-      var ref = oneTime ? value : value.open(function(ref) {
-        self.setAttribute('ref', ref);
-        self.refChanged_();
-      });
-
-      this.setAttribute('ref', ref);
-      this.refChanged_();
-      if (oneTime)
-        return;
-
-      if (!this.bindings_) {
-        this.bindings_ = { ref: value };
-      } else {
-        this.bindings_.ref = value;
-      }
-
-      return value;
-    },
-
-    processBindingDirectives_: function(directives) {
-      if (this.iterator_)
-        this.iterator_.closeDeps();
-
-      if (!directives.if && !directives.bind && !directives.repeat) {
-        if (this.iterator_) {
-          this.iterator_.close();
-          this.iterator_ = undefined;
-        }
-
-        return;
-      }
-
-      if (!this.iterator_) {
-        this.iterator_ = new TemplateIterator(this);
-      }
-
-      this.iterator_.updateDependencies(directives, this.model_);
-
-      if (templateObserver) {
-        templateObserver.observe(this, { attributes: true,
-                                         attributeFilter: ['ref'] });
-      }
-
-      return this.iterator_;
-    },
-
-    createInstance: function(model, bindingDelegate, delegate_) {
-      if (bindingDelegate)
-        delegate_ = this.newDelegate_(bindingDelegate);
-      else if (!delegate_)
-        delegate_ = this.delegate_;
-
-      if (!this.refContent_)
-        this.refContent_ = this.ref_.content;
-      var content = this.refContent_;
-      if (content.firstChild === null)
-        return emptyInstance;
-
-      var map = getInstanceBindingMap(content, delegate_);
-      var stagingDocument = getTemplateStagingDocument(this);
-      var instance = stagingDocument.createDocumentFragment();
-      instance.templateCreator_ = this;
-      instance.protoContent_ = content;
-      instance.bindings_ = [];
-      instance.terminator_ = null;
-      var instanceRecord = instance.templateInstance_ = {
-        firstNode: null,
-        lastNode: null,
-        model: model
-      };
-
-      var i = 0;
-      var collectTerminator = false;
-      for (var child = content.firstChild; child; child = child.nextSibling) {
-        // The terminator of the instance is the clone of the last child of the
-        // content. If the last child is an active template, it may produce
-        // instances as a result of production, so simply collecting the last
-        // child of the instance after it has finished producing may be wrong.
-        if (child.nextSibling === null)
-          collectTerminator = true;
-
-        var clone = cloneAndBindInstance(child, instance, stagingDocument,
-                                         map.children[i++],
-                                         model,
-                                         delegate_,
-                                         instance.bindings_);
-        clone.templateInstance_ = instanceRecord;
-        if (collectTerminator)
-          instance.terminator_ = clone;
-      }
-
-      instanceRecord.firstNode = instance.firstChild;
-      instanceRecord.lastNode = instance.lastChild;
-      instance.templateCreator_ = undefined;
-      instance.protoContent_ = undefined;
-      return instance;
-    },
-
-    get model() {
-      return this.model_;
-    },
-
-    set model(model) {
-      this.model_ = model;
-      ensureSetModelScheduled(this);
-    },
-
-    get bindingDelegate() {
-      return this.delegate_ && this.delegate_.raw;
-    },
-
-    refChanged_: function() {
-      if (!this.iterator_ || this.refContent_ === this.ref_.content)
-        return;
-
-      this.refContent_ = undefined;
-      this.iterator_.valueChanged();
-      this.iterator_.updateIteratedValue(this.iterator_.getUpdatedValue());
-    },
-
-    clear: function() {
-      this.model_ = undefined;
-      this.delegate_ = undefined;
-      if (this.bindings_ && this.bindings_.ref)
-        this.bindings_.ref.close()
-      this.refContent_ = undefined;
-      if (!this.iterator_)
-        return;
-      this.iterator_.valueChanged();
-      this.iterator_.close()
-      this.iterator_ = undefined;
-    },
-
-    setDelegate_: function(delegate) {
-      this.delegate_ = delegate;
-      this.bindingMap_ = undefined;
-      if (this.iterator_) {
-        this.iterator_.instancePositionChangedFn_ = undefined;
-        this.iterator_.instanceModelFn_ = undefined;
-      }
-    },
-
-    newDelegate_: function(bindingDelegate) {
-      if (!bindingDelegate)
-        return;
-
-      function delegateFn(name) {
-        var fn = bindingDelegate && bindingDelegate[name];
-        if (typeof fn != 'function')
-          return;
-
-        return function() {
-          return fn.apply(bindingDelegate, arguments);
-        };
-      }
-
-      return {
-        bindingMaps: {},
-        raw: bindingDelegate,
-        prepareBinding: delegateFn('prepareBinding'),
-        prepareInstanceModel: delegateFn('prepareInstanceModel'),
-        prepareInstancePositionChanged:
-            delegateFn('prepareInstancePositionChanged')
-      };
-    },
-
-    set bindingDelegate(bindingDelegate) {
-      if (this.delegate_) {
-        throw Error('Template must be cleared before a new bindingDelegate ' +
-                    'can be assigned');
-      }
-
-      this.setDelegate_(this.newDelegate_(bindingDelegate));
-    },
-
-    get ref_() {
-      var ref = searchRefId(this, this.getAttribute('ref'));
-      if (!ref)
-        ref = this.instanceRef_;
-
-      if (!ref)
-        return this;
-
-      var nextRef = ref.ref_;
-      return nextRef ? nextRef : ref;
-    }
-  });
-
-  // Returns
-  //   a) undefined if there are no mustaches.
-  //   b) [TEXT, (ONE_TIME?, PATH, DELEGATE_FN, TEXT)+] if there is at least one mustache.
-  function parseMustaches(s, name, node, prepareBindingFn) {
-    if (!s || !s.length)
-      return;
-
-    var tokens;
-    var length = s.length;
-    var startIndex = 0, lastIndex = 0, endIndex = 0;
-    var onlyOneTime = true;
-    while (lastIndex < length) {
-      var startIndex = s.indexOf('{{', lastIndex);
-      var oneTimeStart = s.indexOf('[[', lastIndex);
-      var oneTime = false;
-      var terminator = '}}';
-
-      if (oneTimeStart >= 0 &&
-          (startIndex < 0 || oneTimeStart < startIndex)) {
-        startIndex = oneTimeStart;
-        oneTime = true;
-        terminator = ']]';
-      }
-
-      endIndex = startIndex < 0 ? -1 : s.indexOf(terminator, startIndex + 2);
-
-      if (endIndex < 0) {
-        if (!tokens)
-          return;
-
-        tokens.push(s.slice(lastIndex)); // TEXT
-        break;
-      }
-
-      tokens = tokens || [];
-      tokens.push(s.slice(lastIndex, startIndex)); // TEXT
-      var pathString = s.slice(startIndex + 2, endIndex).trim();
-      tokens.push(oneTime); // ONE_TIME?
-      onlyOneTime = onlyOneTime && oneTime;
-      var delegateFn = prepareBindingFn &&
-                       prepareBindingFn(pathString, name, node);
-      // Don't try to parse the expression if there's a prepareBinding function
-      if (delegateFn == null) {
-        tokens.push(Path.get(pathString)); // PATH
-      } else {
-        tokens.push(null);
-      }
-      tokens.push(delegateFn); // DELEGATE_FN
-      lastIndex = endIndex + 2;
-    }
-
-    if (lastIndex === length)
-      tokens.push(''); // TEXT
-
-    tokens.hasOnePath = tokens.length === 5;
-    tokens.isSimplePath = tokens.hasOnePath &&
-                          tokens[0] == '' &&
-                          tokens[4] == '';
-    tokens.onlyOneTime = onlyOneTime;
-
-    tokens.combinator = function(values) {
-      var newValue = tokens[0];
-
-      for (var i = 1; i < tokens.length; i += 4) {
-        var value = tokens.hasOnePath ? values : values[(i - 1) / 4];
-        if (value !== undefined)
-          newValue += value;
-        newValue += tokens[i + 3];
-      }
-
-      return newValue;
-    }
-
-    return tokens;
-  };
-
-  function processOneTimeBinding(name, tokens, node, model) {
-    if (tokens.hasOnePath) {
-      var delegateFn = tokens[3];
-      var value = delegateFn ? delegateFn(model, node, true) :
-                               tokens[2].getValueFrom(model);
-      return tokens.isSimplePath ? value : tokens.combinator(value);
-    }
-
-    var values = [];
-    for (var i = 1; i < tokens.length; i += 4) {
-      var delegateFn = tokens[i + 2];
-      values[(i - 1) / 4] = delegateFn ? delegateFn(model, node) :
-          tokens[i + 1].getValueFrom(model);
-    }
-
-    return tokens.combinator(values);
-  }
-
-  function processSinglePathBinding(name, tokens, node, model) {
-    var delegateFn = tokens[3];
-    var observer = delegateFn ? delegateFn(model, node, false) :
-        new PathObserver(model, tokens[2]);
-
-    return tokens.isSimplePath ? observer :
-        new ObserverTransform(observer, tokens.combinator);
-  }
-
-  function processBinding(name, tokens, node, model) {
-    if (tokens.onlyOneTime)
-      return processOneTimeBinding(name, tokens, node, model);
-
-    if (tokens.hasOnePath)
-      return processSinglePathBinding(name, tokens, node, model);
-
-    var observer = new CompoundObserver();
-
-    for (var i = 1; i < tokens.length; i += 4) {
-      var oneTime = tokens[i];
-      var delegateFn = tokens[i + 2];
-
-      if (delegateFn) {
-        var value = delegateFn(model, node, oneTime);
-        if (oneTime)
-          observer.addPath(value)
-        else
-          observer.addObserver(value);
-        continue;
-      }
-
-      var path = tokens[i + 1];
-      if (oneTime)
-        observer.addPath(path.getValueFrom(model))
-      else
-        observer.addPath(model, path);
-    }
-
-    return new ObserverTransform(observer, tokens.combinator);
-  }
-
-  function processBindings(node, bindings, model, instanceBindings) {
-    for (var i = 0; i < bindings.length; i += 2) {
-      var name = bindings[i]
-      var tokens = bindings[i + 1];
-      var value = processBinding(name, tokens, node, model);
-      var binding = node.bind(name, value, tokens.onlyOneTime);
-      if (binding && instanceBindings)
-        instanceBindings.push(binding);
-    }
-
-    node.bindFinished();
-    if (!bindings.isTemplate)
-      return;
-
-    node.model_ = model;
-    var iter = node.processBindingDirectives_(bindings);
-    if (instanceBindings && iter)
-      instanceBindings.push(iter);
-  }
-
-  function parseWithDefault(el, name, prepareBindingFn) {
-    var v = el.getAttribute(name);
-    return parseMustaches(v == '' ? '{{}}' : v, name, el, prepareBindingFn);
-  }
-
-  function parseAttributeBindings(element, prepareBindingFn) {
-    assert(element);
-
-    var bindings = [];
-    var ifFound = false;
-    var bindFound = false;
-
-    for (var i = 0; i < element.attributes.length; i++) {
-      var attr = element.attributes[i];
-      var name = attr.name;
-      var value = attr.value;
-
-      // Allow bindings expressed in attributes to be prefixed with underbars.
-      // We do this to allow correct semantics for browsers that don't implement
-      // <template> where certain attributes might trigger side-effects -- and
-      // for IE which sanitizes certain attributes, disallowing mustache
-      // replacements in their text.
-      while (name[0] === '_') {
-        name = name.substring(1);
-      }
-
-      if (isTemplate(element) &&
-          (name === IF || name === BIND || name === REPEAT)) {
-        continue;
-      }
-
-      var tokens = parseMustaches(value, name, element,
-                                  prepareBindingFn);
-      if (!tokens)
-        continue;
-
-      bindings.push(name, tokens);
-    }
-
-    if (isTemplate(element)) {
-      bindings.isTemplate = true;
-      bindings.if = parseWithDefault(element, IF, prepareBindingFn);
-      bindings.bind = parseWithDefault(element, BIND, prepareBindingFn);
-      bindings.repeat = parseWithDefault(element, REPEAT, prepareBindingFn);
-
-      if (bindings.if && !bindings.bind && !bindings.repeat)
-        bindings.bind = parseMustaches('{{}}', BIND, element, prepareBindingFn);
-    }
-
-    return bindings;
-  }
-
-  function getBindings(node, prepareBindingFn) {
-    if (node.nodeType === Node.ELEMENT_NODE)
-      return parseAttributeBindings(node, prepareBindingFn);
-
-    if (node.nodeType === Node.TEXT_NODE) {
-      var tokens = parseMustaches(node.data, 'textContent', node,
-                                  prepareBindingFn);
-      if (tokens)
-        return ['textContent', tokens];
-    }
-
-    return [];
-  }
-
-  function cloneAndBindInstance(node, parent, stagingDocument, bindings, model,
-                                delegate,
-                                instanceBindings,
-                                instanceRecord) {
-    var clone = parent.appendChild(stagingDocument.importNode(node, false));
-
-    var i = 0;
-    for (var child = node.firstChild; child; child = child.nextSibling) {
-      cloneAndBindInstance(child, clone, stagingDocument,
-                            bindings.children[i++],
-                            model,
-                            delegate,
-                            instanceBindings);
-    }
-
-    if (bindings.isTemplate) {
-      HTMLTemplateElement.decorate(clone, node);
-      if (delegate)
-        clone.setDelegate_(delegate);
-    }
-
-    processBindings(clone, bindings, model, instanceBindings);
-    return clone;
-  }
-
-  function createInstanceBindingMap(node, prepareBindingFn) {
-    var map = getBindings(node, prepareBindingFn);
-    map.children = {};
-    var index = 0;
-    for (var child = node.firstChild; child; child = child.nextSibling) {
-      map.children[index++] = createInstanceBindingMap(child, prepareBindingFn);
-    }
-
-    return map;
-  }
-
-  var contentUidCounter = 1;
-
-  // TODO(rafaelw): Setup a MutationObserver on content which clears the id
-  // so that bindingMaps regenerate when the template.content changes.
-  function getContentUid(content) {
-    var id = content.id_;
-    if (!id)
-      id = content.id_ = contentUidCounter++;
-    return id;
-  }
-
-  // Each delegate is associated with a set of bindingMaps, one for each
-  // content which may be used by a template. The intent is that each binding
-  // delegate gets the opportunity to prepare the instance (via the prepare*
-  // delegate calls) once across all uses.
-  // TODO(rafaelw): Separate out the parse map from the binding map. In the
-  // current implementation, if two delegates need a binding map for the same
-  // content, the second will have to reparse.
-  function getInstanceBindingMap(content, delegate_) {
-    var contentId = getContentUid(content);
-    if (delegate_) {
-      var map = delegate_.bindingMaps[contentId];
-      if (!map) {
-        map = delegate_.bindingMaps[contentId] =
-            createInstanceBindingMap(content, delegate_.prepareBinding) || [];
-      }
-      return map;
-    }
-
-    var map = content.bindingMap_;
-    if (!map) {
-      map = content.bindingMap_ =
-          createInstanceBindingMap(content, undefined) || [];
-    }
-    return map;
-  }
-
-  Object.defineProperty(Node.prototype, 'templateInstance', {
-    get: function() {
-      var instance = this.templateInstance_;
-      return instance ? instance :
-          (this.parentNode ? this.parentNode.templateInstance : undefined);
-    }
-  });
-
-  var emptyInstance = document.createDocumentFragment();
-  emptyInstance.bindings_ = [];
-  emptyInstance.terminator_ = null;
-
-  function TemplateIterator(templateElement) {
-    this.closed = false;
-    this.templateElement_ = templateElement;
-    this.instances = [];
-    this.deps = undefined;
-    this.iteratedValue = [];
-    this.presentValue = undefined;
-    this.arrayObserver = undefined;
-  }
-
-  TemplateIterator.prototype = {
-    closeDeps: function() {
-      var deps = this.deps;
-      if (deps) {
-        if (deps.ifOneTime === false)
-          deps.ifValue.close();
-        if (deps.oneTime === false)
-          deps.value.close();
-      }
-    },
-
-    updateDependencies: function(directives, model) {
-      this.closeDeps();
-
-      var deps = this.deps = {};
-      var template = this.templateElement_;
-
-      var ifValue = true;
-      if (directives.if) {
-        deps.hasIf = true;
-        deps.ifOneTime = directives.if.onlyOneTime;
-        deps.ifValue = processBinding(IF, directives.if, template, model);
-
-        ifValue = deps.ifValue;
-
-        // oneTime if & predicate is false. nothing else to do.
-        if (deps.ifOneTime && !ifValue) {
-          this.valueChanged();
-          return;
-        }
-
-        if (!deps.ifOneTime)
-          ifValue = ifValue.open(this.updateIfValue, this);
-      }
-
-      if (directives.repeat) {
-        deps.repeat = true;
-        deps.oneTime = directives.repeat.onlyOneTime;
-        deps.value = processBinding(REPEAT, directives.repeat, template, model);
-      } else {
-        deps.repeat = false;
-        deps.oneTime = directives.bind.onlyOneTime;
-        deps.value = processBinding(BIND, directives.bind, template, model);
-      }
-
-      var value = deps.value;
-      if (!deps.oneTime)
-        value = value.open(this.updateIteratedValue, this);
-
-      if (!ifValue) {
-        this.valueChanged();
-        return;
-      }
-
-      this.updateValue(value);
-    },
-
-    /**
-     * Gets the updated value of the bind/repeat. This can potentially call
-     * user code (if a bindingDelegate is set up) so we try to avoid it if we
-     * already have the value in hand (from Observer.open).
-     */
-    getUpdatedValue: function() {
-      var value = this.deps.value;
-      if (!this.deps.oneTime)
-        value = value.discardChanges();
-      return value;
-    },
-
-    updateIfValue: function(ifValue) {
-      if (!ifValue) {
-        this.valueChanged();
-        return;
-      }
-
-      this.updateValue(this.getUpdatedValue());
-    },
-
-    updateIteratedValue: function(value) {
-      if (this.deps.hasIf) {
-        var ifValue = this.deps.ifValue;
-        if (!this.deps.ifOneTime)
-          ifValue = ifValue.discardChanges();
-        if (!ifValue) {
-          this.valueChanged();
-          return;
-        }
-      }
-
-      this.updateValue(value);
-    },
-
-    updateValue: function(value) {
-      if (!this.deps.repeat)
-        value = [value];
-      var observe = this.deps.repeat &&
-                    !this.deps.oneTime &&
-                    Array.isArray(value);
-      this.valueChanged(value, observe);
-    },
-
-    valueChanged: function(value, observeValue) {
-      if (!Array.isArray(value))
-        value = [];
-
-      if (value === this.iteratedValue)
-        return;
-
-      this.unobserve();
-      this.presentValue = value;
-      if (observeValue) {
-        this.arrayObserver = new ArrayObserver(this.presentValue);
-        this.arrayObserver.open(this.handleSplices, this);
-      }
-
-      this.handleSplices(ArrayObserver.calculateSplices(this.presentValue,
-                                                        this.iteratedValue));
-    },
-
-    getLastInstanceNode: function(index) {
-      if (index == -1)
-        return this.templateElement_;
-      var instance = this.instances[index];
-      var terminator = instance.terminator_;
-      if (!terminator)
-        return this.getLastInstanceNode(index - 1);
-
-      if (terminator.nodeType !== Node.ELEMENT_NODE ||
-          this.templateElement_ === terminator) {
-        return terminator;
-      }
-
-      var subtemplateIterator = terminator.iterator_;
-      if (!subtemplateIterator)
-        return terminator;
-
-      return subtemplateIterator.getLastTemplateNode();
-    },
-
-    getLastTemplateNode: function() {
-      return this.getLastInstanceNode(this.instances.length - 1);
-    },
-
-    insertInstanceAt: function(index, fragment) {
-      var previousInstanceLast = this.getLastInstanceNode(index - 1);
-      var parent = this.templateElement_.parentNode;
-      this.instances.splice(index, 0, fragment);
-
-      parent.insertBefore(fragment, previousInstanceLast.nextSibling);
-    },
-
-    extractInstanceAt: function(index) {
-      var previousInstanceLast = this.getLastInstanceNode(index - 1);
-      var lastNode = this.getLastInstanceNode(index);
-      var parent = this.templateElement_.parentNode;
-      var instance = this.instances.splice(index, 1)[0];
-
-      while (lastNode !== previousInstanceLast) {
-        var node = previousInstanceLast.nextSibling;
-        if (node == lastNode)
-          lastNode = previousInstanceLast;
-
-        instance.appendChild(parent.removeChild(node));
-      }
-
-      return instance;
-    },
-
-    getDelegateFn: function(fn) {
-      fn = fn && fn(this.templateElement_);
-      return typeof fn === 'function' ? fn : null;
-    },
-
-    handleSplices: function(splices) {
-      if (this.closed || !splices.length)
-        return;
-
-      var template = this.templateElement_;
-
-      if (!template.parentNode) {
-        this.close();
-        return;
-      }
-
-      ArrayObserver.applySplices(this.iteratedValue, this.presentValue,
-                                 splices);
-
-      var delegate = template.delegate_;
-      if (this.instanceModelFn_ === undefined) {
-        this.instanceModelFn_ =
-            this.getDelegateFn(delegate && delegate.prepareInstanceModel);
-      }
-
-      if (this.instancePositionChangedFn_ === undefined) {
-        this.instancePositionChangedFn_ =
-            this.getDelegateFn(delegate &&
-                               delegate.prepareInstancePositionChanged);
-      }
-
-      // Instance Removals
-      var instanceCache = new Map;
-      var removeDelta = 0;
-      for (var i = 0; i < splices.length; i++) {
-        var splice = splices[i];
-        var removed = splice.removed;
-        for (var j = 0; j < removed.length; j++) {
-          var model = removed[j];
-          var instance = this.extractInstanceAt(splice.index + removeDelta);
-          if (instance !== emptyInstance) {
-            instanceCache.set(model, instance);
-          }
-        }
-
-        removeDelta -= splice.addedCount;
-      }
-
-      // Instance Insertions
-      for (var i = 0; i < splices.length; i++) {
-        var splice = splices[i];
-        var addIndex = splice.index;
-        for (; addIndex < splice.index + splice.addedCount; addIndex++) {
-          var model = this.iteratedValue[addIndex];
-          var instance = instanceCache.get(model);
-          if (instance) {
-            instanceCache.delete(model);
-          } else {
-            if (this.instanceModelFn_) {
-              model = this.instanceModelFn_(model);
-            }
-
-            if (model === undefined) {
-              instance = emptyInstance;
-            } else {
-              instance = template.createInstance(model, undefined, delegate);
-            }
-          }
-
-          this.insertInstanceAt(addIndex, instance);
-        }
-      }
-
-      instanceCache.forEach(function(instance) {
-        this.closeInstanceBindings(instance);
-      }, this);
-
-      if (this.instancePositionChangedFn_)
-        this.reportInstancesMoved(splices);
-    },
-
-    reportInstanceMoved: function(index) {
-      var instance = this.instances[index];
-      if (instance === emptyInstance)
-        return;
-
-      this.instancePositionChangedFn_(instance.templateInstance_, index);
-    },
-
-    reportInstancesMoved: function(splices) {
-      var index = 0;
-      var offset = 0;
-      for (var i = 0; i < splices.length; i++) {
-        var splice = splices[i];
-        if (offset != 0) {
-          while (index < splice.index) {
-            this.reportInstanceMoved(index);
-            index++;
-          }
-        } else {
-          index = splice.index;
-        }
-
-        while (index < splice.index + splice.addedCount) {
-          this.reportInstanceMoved(index);
-          index++;
-        }
-
-        offset += splice.addedCount - splice.removed.length;
-      }
-
-      if (offset == 0)
-        return;
-
-      var length = this.instances.length;
-      while (index < length) {
-        this.reportInstanceMoved(index);
-        index++;
-      }
-    },
-
-    closeInstanceBindings: function(instance) {
-      var bindings = instance.bindings_;
-      for (var i = 0; i < bindings.length; i++) {
-        bindings[i].close();
-      }
-    },
-
-    unobserve: function() {
-      if (!this.arrayObserver)
-        return;
-
-      this.arrayObserver.close();
-      this.arrayObserver = undefined;
-    },
-
-    close: function() {
-      if (this.closed)
-        return;
-      this.unobserve();
-      for (var i = 0; i < this.instances.length; i++) {
-        this.closeInstanceBindings(this.instances[i]);
-      }
-
-      this.instances.length = 0;
-      this.closeDeps();
-      this.templateElement_.iterator_ = undefined;
-      this.closed = true;
-    }
-  };
-
-  // Polyfill-specific API.
-  HTMLTemplateElement.forAllTemplatesFrom_ = forAllTemplatesFrom;
-})(this);
-
-(function(scope) {
-  'use strict';
-
-  // feature detect for URL constructor
-  var hasWorkingUrl = false;
-  if (!scope.forceJURL) {
-    try {
-      var u = new URL('b', 'http://a');
-      u.pathname = 'c%20d';
-      hasWorkingUrl = u.href === 'http://a/c%20d';
-    } catch(e) {}
-  }
-
-  if (hasWorkingUrl)
-    return;
-
-  var relative = Object.create(null);
-  relative['ftp'] = 21;
-  relative['file'] = 0;
-  relative['gopher'] = 70;
-  relative['http'] = 80;
-  relative['https'] = 443;
-  relative['ws'] = 80;
-  relative['wss'] = 443;
-
-  var relativePathDotMapping = Object.create(null);
-  relativePathDotMapping['%2e'] = '.';
-  relativePathDotMapping['.%2e'] = '..';
-  relativePathDotMapping['%2e.'] = '..';
-  relativePathDotMapping['%2e%2e'] = '..';
-
-  function isRelativeScheme(scheme) {
-    return relative[scheme] !== undefined;
-  }
-
-  function invalid() {
-    clear.call(this);
-    this._isInvalid = true;
-  }
-
-  function IDNAToASCII(h) {
-    if ('' == h) {
-      invalid.call(this)
-    }
-    // XXX
-    return h.toLowerCase()
-  }
-
-  function percentEscape(c) {
-    var unicode = c.charCodeAt(0);
-    if (unicode > 0x20 &&
-       unicode < 0x7F &&
-       // " # < > ? `
-       [0x22, 0x23, 0x3C, 0x3E, 0x3F, 0x60].indexOf(unicode) == -1
-      ) {
-      return c;
-    }
-    return encodeURIComponent(c);
-  }
-
-  function percentEscapeQuery(c) {
-    // XXX This actually needs to encode c using encoding and then
-    // convert the bytes one-by-one.
-
-    var unicode = c.charCodeAt(0);
-    if (unicode > 0x20 &&
-       unicode < 0x7F &&
-       // " # < > ` (do not escape '?')
-       [0x22, 0x23, 0x3C, 0x3E, 0x60].indexOf(unicode) == -1
-      ) {
-      return c;
-    }
-    return encodeURIComponent(c);
-  }
-
-  var EOF = undefined,
-      ALPHA = /[a-zA-Z]/,
-      ALPHANUMERIC = /[a-zA-Z0-9\+\-\.]/;
-
-  function parse(input, stateOverride, base) {
-    function err(message) {
-      errors.push(message)
-    }
-
-    var state = stateOverride || 'scheme start',
-        cursor = 0,
-        buffer = '',
-        seenAt = false,
-        seenBracket = false,
-        errors = [];
-
-    loop: while ((input[cursor - 1] != EOF || cursor == 0) && !this._isInvalid) {
-      var c = input[cursor];
-      switch (state) {
-        case 'scheme start':
-          if (c && ALPHA.test(c)) {
-            buffer += c.toLowerCase(); // ASCII-safe
-            state = 'scheme';
-          } else if (!stateOverride) {
-            buffer = '';
-            state = 'no scheme';
-            continue;
-          } else {
-            err('Invalid scheme.');
-            break loop;
-          }
-          break;
-
-        case 'scheme':
-          if (c && ALPHANUMERIC.test(c)) {
-            buffer += c.toLowerCase(); // ASCII-safe
-          } else if (':' == c) {
-            this._scheme = buffer;
-            buffer = '';
-            if (stateOverride) {
-              break loop;
-            }
-            if (isRelativeScheme(this._scheme)) {
-              this._isRelative = true;
-            }
-            if ('file' == this._scheme) {
-              state = 'relative';
-            } else if (this._isRelative && base && base._scheme == this._scheme) {
-              state = 'relative or authority';
-            } else if (this._isRelative) {
-              state = 'authority first slash';
-            } else {
-              state = 'scheme data';
-            }
-          } else if (!stateOverride) {
-            buffer = '';
-            cursor = 0;
-            state = 'no scheme';
-            continue;
-          } else if (EOF == c) {
-            break loop;
-          } else {
-            err('Code point not allowed in scheme: ' + c)
-            break loop;
-          }
-          break;
-
-        case 'scheme data':
-          if ('?' == c) {
-            query = '?';
-            state = 'query';
-          } else if ('#' == c) {
-            this._fragment = '#';
-            state = 'fragment';
-          } else {
-            // XXX error handling
-            if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
-              this._schemeData += percentEscape(c);
-            }
-          }
-          break;
-
-        case 'no scheme':
-          if (!base || !(isRelativeScheme(base._scheme))) {
-            err('Missing scheme.');
-            invalid.call(this);
-          } else {
-            state = 'relative';
-            continue;
-          }
-          break;
-
-        case 'relative or authority':
-          if ('/' == c && '/' == input[cursor+1]) {
-            state = 'authority ignore slashes';
-          } else {
-            err('Expected /, got: ' + c);
-            state = 'relative';
-            continue
-          }
-          break;
-
-        case 'relative':
-          this._isRelative = true;
-          if ('file' != this._scheme)
-            this._scheme = base._scheme;
-          if (EOF == c) {
-            this._host = base._host;
-            this._port = base._port;
-            this._path = base._path.slice();
-            this._query = base._query;
-            break loop;
-          } else if ('/' == c || '\\' == c) {
-            if ('\\' == c)
-              err('\\ is an invalid code point.');
-            state = 'relative slash';
-          } else if ('?' == c) {
-            this._host = base._host;
-            this._port = base._port;
-            this._path = base._path.slice();
-            this._query = '?';
-            state = 'query';
-          } else if ('#' == c) {
-            this._host = base._host;
-            this._port = base._port;
-            this._path = base._path.slice();
-            this._query = base._query;
-            this._fragment = '#';
-            state = 'fragment';
-          } else {
-            var nextC = input[cursor+1]
-            var nextNextC = input[cursor+2]
-            if (
-              'file' != this._scheme || !ALPHA.test(c) ||
-              (nextC != ':' && nextC != '|') ||
-              (EOF != nextNextC && '/' != nextNextC && '\\' != nextNextC && '?' != nextNextC && '#' != nextNextC)) {
-              this._host = base._host;
-              this._port = base._port;
-              this._path = base._path.slice();
-              this._path.pop();
-            }
-            state = 'relative path';
-            continue;
-          }
-          break;
-
-        case 'relative slash':
-          if ('/' == c || '\\' == c) {
-            if ('\\' == c) {
-              err('\\ is an invalid code point.');
-            }
-            if ('file' == this._scheme) {
-              state = 'file host';
-            } else {
-              state = 'authority ignore slashes';
-            }
-          } else {
-            if ('file' != this._scheme) {
-              this._host = base._host;
-              this._port = base._port;
-            }
-            state = 'relative path';
-            continue;
-          }
-          break;
-
-        case 'authority first slash':
-          if ('/' == c) {
-            state = 'authority second slash';
-          } else {
-            err("Expected '/', got: " + c);
-            state = 'authority ignore slashes';
-            continue;
-          }
-          break;
-
-        case 'authority second slash':
-          state = 'authority ignore slashes';
-          if ('/' != c) {
-            err("Expected '/', got: " + c);
-            continue;
-          }
-          break;
-
-        case 'authority ignore slashes':
-          if ('/' != c && '\\' != c) {
-            state = 'authority';
-            continue;
-          } else {
-            err('Expected authority, got: ' + c);
-          }
-          break;
-
-        case 'authority':
-          if ('@' == c) {
-            if (seenAt) {
-              err('@ already seen.');
-              buffer += '%40';
-            }
-            seenAt = true;
-            for (var i = 0; i < buffer.length; i++) {
-              var cp = buffer[i];
-              if ('\t' == cp || '\n' == cp || '\r' == cp) {
-                err('Invalid whitespace in authority.');
-                continue;
-              }
-              // XXX check URL code points
-              if (':' == cp && null === this._password) {
-                this._password = '';
-                continue;
-              }
-              var tempC = percentEscape(cp);
-              (null !== this._password) ? this._password += tempC : this._username += tempC;
-            }
-            buffer = '';
-          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
-            cursor -= buffer.length;
-            buffer = '';
-            state = 'host';
-            continue;
-          } else {
-            buffer += c;
-          }
-          break;
-
-        case 'file host':
-          if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
-            if (buffer.length == 2 && ALPHA.test(buffer[0]) && (buffer[1] == ':' || buffer[1] == '|')) {
-              state = 'relative path';
-            } else if (buffer.length == 0) {
-              state = 'relative path start';
-            } else {
-              this._host = IDNAToASCII.call(this, buffer);
-              buffer = '';
-              state = 'relative path start';
-            }
-            continue;
-          } else if ('\t' == c || '\n' == c || '\r' == c) {
-            err('Invalid whitespace in file host.');
-          } else {
-            buffer += c;
-          }
-          break;
-
-        case 'host':
-        case 'hostname':
-          if (':' == c && !seenBracket) {
-            // XXX host parsing
-            this._host = IDNAToASCII.call(this, buffer);
-            buffer = '';
-            state = 'port';
-            if ('hostname' == stateOverride) {
-              break loop;
-            }
-          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
-            this._host = IDNAToASCII.call(this, buffer);
-            buffer = '';
-            state = 'relative path start';
-            if (stateOverride) {
-              break loop;
-            }
-            continue;
-          } else if ('\t' != c && '\n' != c && '\r' != c) {
-            if ('[' == c) {
-              seenBracket = true;
-            } else if (']' == c) {
-              seenBracket = false;
-            }
-            buffer += c;
-          } else {
-            err('Invalid code point in host/hostname: ' + c);
-          }
-          break;
-
-        case 'port':
-          if (/[0-9]/.test(c)) {
-            buffer += c;
-          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c || stateOverride) {
-            if ('' != buffer) {
-              var temp = parseInt(buffer, 10);
-              if (temp != relative[this._scheme]) {
-                this._port = temp + '';
-              }
-              buffer = '';
-            }
-            if (stateOverride) {
-              break loop;
-            }
-            state = 'relative path start';
-            continue;
-          } else if ('\t' == c || '\n' == c || '\r' == c) {
-            err('Invalid code point in port: ' + c);
-          } else {
-            invalid.call(this);
-          }
-          break;
-
-        case 'relative path start':
-          if ('\\' == c)
-            err("'\\' not allowed in path.");
-          state = 'relative path';
-          if ('/' != c && '\\' != c) {
-            continue;
-          }
-          break;
-
-        case 'relative path':
-          if (EOF == c || '/' == c || '\\' == c || (!stateOverride && ('?' == c || '#' == c))) {
-            if ('\\' == c) {
-              err('\\ not allowed in relative path.');
-            }
-            var tmp;
-            if (tmp = relativePathDotMapping[buffer.toLowerCase()]) {
-              buffer = tmp;
-            }
-            if ('..' == buffer) {
-              this._path.pop();
-              if ('/' != c && '\\' != c) {
-                this._path.push('');
-              }
-            } else if ('.' == buffer && '/' != c && '\\' != c) {
-              this._path.push('');
-            } else if ('.' != buffer) {
-              if ('file' == this._scheme && this._path.length == 0 && buffer.length == 2 && ALPHA.test(buffer[0]) && buffer[1] == '|') {
-                buffer = buffer[0] + ':';
-              }
-              this._path.push(buffer);
-            }
-            buffer = '';
-            if ('?' == c) {
-              this._query = '?';
-              state = 'query';
-            } else if ('#' == c) {
-              this._fragment = '#';
-              state = 'fragment';
-            }
-          } else if ('\t' != c && '\n' != c && '\r' != c) {
-            buffer += percentEscape(c);
-          }
-          break;
-
-        case 'query':
-          if (!stateOverride && '#' == c) {
-            this._fragment = '#';
-            state = 'fragment';
-          } else if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
-            this._query += percentEscapeQuery(c);
-          }
-          break;
-
-        case 'fragment':
-          if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
-            this._fragment += c;
-          }
-          break;
-      }
-
-      cursor++;
-    }
-  }
-
-  function clear() {
-    this._scheme = '';
-    this._schemeData = '';
-    this._username = '';
-    this._password = null;
-    this._host = '';
-    this._port = '';
-    this._path = [];
-    this._query = '';
-    this._fragment = '';
-    this._isInvalid = false;
-    this._isRelative = false;
-  }
-
-  // Does not process domain names or IP addresses.
-  // Does not handle encoding for the query parameter.
-  function jURL(url, base /* , encoding */) {
-    if (base !== undefined && !(base instanceof jURL))
-      base = new jURL(String(base));
-
-    this._url = url;
-    clear.call(this);
-
-    var input = url.replace(/^[ \t\r\n\f]+|[ \t\r\n\f]+$/g, '');
-    // encoding = encoding || 'utf-8'
-
-    parse.call(this, input, null, base);
-  }
-
-  jURL.prototype = {
-    get href() {
-      if (this._isInvalid)
-        return this._url;
-
-      var authority = '';
-      if ('' != this._username || null != this._password) {
-        authority = this._username +
-            (null != this._password ? ':' + this._password : '') + '@';
-      }
-
-      return this.protocol +
-          (this._isRelative ? '//' + authority + this.host : '') +
-          this.pathname + this._query + this._fragment;
-    },
-    set href(href) {
-      clear.call(this);
-      parse.call(this, href);
-    },
-
-    get protocol() {
-      return this._scheme + ':';
-    },
-    set protocol(protocol) {
-      if (this._isInvalid)
-        return;
-      parse.call(this, protocol + ':', 'scheme start');
-    },
-
-    get host() {
-      return this._isInvalid ? '' : this._port ?
-          this._host + ':' + this._port : this._host;
-    },
-    set host(host) {
-      if (this._isInvalid || !this._isRelative)
-        return;
-      parse.call(this, host, 'host');
-    },
-
-    get hostname() {
-      return this._host;
-    },
-    set hostname(hostname) {
-      if (this._isInvalid || !this._isRelative)
-        return;
-      parse.call(this, hostname, 'hostname');
-    },
-
-    get port() {
-      return this._port;
-    },
-    set port(port) {
-      if (this._isInvalid || !this._isRelative)
-        return;
-      parse.call(this, port, 'port');
-    },
-
-    get pathname() {
-      return this._isInvalid ? '' : this._isRelative ?
-          '/' + this._path.join('/') : this._schemeData;
-    },
-    set pathname(pathname) {
-      if (this._isInvalid || !this._isRelative)
-        return;
-      this._path = [];
-      parse.call(this, pathname, 'relative path start');
-    },
-
-    get search() {
-      return this._isInvalid || !this._query || '?' == this._query ?
-          '' : this._query;
-    },
-    set search(search) {
-      if (this._isInvalid || !this._isRelative)
-        return;
-      this._query = '?';
-      if ('?' == search[0])
-        search = search.slice(1);
-      parse.call(this, search, 'query');
-    },
-
-    get hash() {
-      return this._isInvalid || !this._fragment || '#' == this._fragment ?
-          '' : this._fragment;
-    },
-    set hash(hash) {
-      if (this._isInvalid)
-        return;
-      this._fragment = '#';
-      if ('#' == hash[0])
-        hash = hash.slice(1);
-      parse.call(this, hash, 'fragment');
-    },
-
-    get origin() {
-      var host;
-      if (this._isInvalid || !this._scheme) {
-        return '';
-      }
-      // javascript: Gecko returns String(""), WebKit/Blink String("null")
-      // Gecko throws error for "data://"
-      // data: Gecko returns "", Blink returns "data://", WebKit returns "null"
-      // Gecko returns String("") for file: mailto:
-      // WebKit/Blink returns String("SCHEME://") for file: mailto:
-      switch (this._scheme) {
-        case 'data':
-        case 'file':
-        case 'javascript':
-        case 'mailto':
-          return 'null';
-      }
-      host = this.host;
-      if (!host) {
-        return '';
-      }
-      return this._scheme + '://' + host;
-    }
-  };
-
-  // Copy over the static methods
-  var OriginalURL = scope.URL;
-  if (OriginalURL) {
-    jURL.createObjectURL = function(blob) {
-      // IE extension allows a second optional options argument.
-      // http://msdn.microsoft.com/en-us/library/ie/hh772302(v=vs.85).aspx
-      return OriginalURL.createObjectURL.apply(OriginalURL, arguments);
-    };
-    jURL.revokeObjectURL = function(url) {
-      OriginalURL.revokeObjectURL(url);
-    };
-  }
-
-  scope.URL = jURL;
-
-})(this);
-
-(function(scope) {
-
-var iterations = 0;
-var callbacks = [];
-var twiddle = document.createTextNode('');
-
-function endOfMicrotask(callback) {
-  twiddle.textContent = iterations++;
-  callbacks.push(callback);
-}
-
-function atEndOfMicrotask() {
-  while (callbacks.length) {
-    callbacks.shift()();
-  }
-}
-
-new (window.MutationObserver || JsMutationObserver)(atEndOfMicrotask)
-  .observe(twiddle, {characterData: true})
-  ;
-
-// exports
-scope.endOfMicrotask = endOfMicrotask;
-// bc 
-Platform.endOfMicrotask = endOfMicrotask;
-
-})(Polymer);
-
-
-(function(scope) {
-
-/**
- * @class Polymer
- */
-
-// imports
-var endOfMicrotask = scope.endOfMicrotask;
-
-// logging
-var log = window.WebComponents ? WebComponents.flags.log : {};
-
-// inject style sheet
-var style = document.createElement('style');
-style.textContent = 'template {display: none !important;} /* injected by platform.js */';
-var head = document.querySelector('head');
-head.insertBefore(style, head.firstChild);
-
-
-/**
- * Force any pending data changes to be observed before 
- * the next task. Data changes are processed asynchronously but are guaranteed
- * to be processed, for example, before painting. This method should rarely be 
- * needed. It does nothing when Object.observe is available; 
- * when Object.observe is not available, Polymer automatically flushes data 
- * changes approximately every 1/10 second. 
- * Therefore, `flush` should only be used when a data mutation should be 
- * observed sooner than this.
- * 
- * @method flush
- */
-// flush (with logging)
-var flushing;
-function flush() {
-  if (!flushing) {
-    flushing = true;
-    endOfMicrotask(function() {
-      flushing = false;
-      log.data && console.group('flush');
-      Platform.performMicrotaskCheckpoint();
-      log.data && console.groupEnd();
-    });
-  }
-};
-
-// polling dirty checker
-// flush periodically if platform does not have object observe.
-if (!Observer.hasObjectObserve) {
-  var FLUSH_POLL_INTERVAL = 125;
-  window.addEventListener('WebComponentsReady', function() {
-    flush();
-    // watch document visiblity to toggle dirty-checking
-    var visibilityHandler = function() {
-      // only flush if the page is visibile
-      if (document.visibilityState === 'hidden') {
-        if (scope.flushPoll) {
-          clearInterval(scope.flushPoll);
-        }
-      } else {
-        scope.flushPoll = setInterval(flush, FLUSH_POLL_INTERVAL);
-      }
-    };
-    if (typeof document.visibilityState === 'string') {
-      document.addEventListener('visibilitychange', visibilityHandler);
-    }
-    visibilityHandler();
-  });
-} else {
-  // make flush a no-op when we have Object.observe
-  flush = function() {};
-}
-
-if (window.CustomElements && !CustomElements.useNative) {
-  var originalImportNode = Document.prototype.importNode;
-  Document.prototype.importNode = function(node, deep) {
-    var imported = originalImportNode.call(this, node, deep);
-    CustomElements.upgradeAll(imported);
-    return imported;
-  };
-}
-
-// exports
-scope.flush = flush;
-// bc
-Platform.flush = flush;
-
-})(window.Polymer);
-
-
-(function(scope) {
-
-var urlResolver = {
-  resolveDom: function(root, url) {
-    url = url || baseUrl(root);
-    this.resolveAttributes(root, url);
-    this.resolveStyles(root, url);
-    // handle template.content
-    var templates = root.querySelectorAll('template');
-    if (templates) {
-      for (var i = 0, l = templates.length, t; (i < l) && (t = templates[i]); i++) {
-        if (t.content) {
-          this.resolveDom(t.content, url);
-        }
-      }
-    }
-  },
-  resolveTemplate: function(template) {
-    this.resolveDom(template.content, baseUrl(template));
-  },
-  resolveStyles: function(root, url) {
-    var styles = root.querySelectorAll('style');
-    if (styles) {
-      for (var i = 0, l = styles.length, s; (i < l) && (s = styles[i]); i++) {
-        this.resolveStyle(s, url);
-      }
-    }
-  },
-  resolveStyle: function(style, url) {
-    url = url || baseUrl(style);
-    style.textContent = this.resolveCssText(style.textContent, url);
-  },
-  resolveCssText: function(cssText, baseUrl, keepAbsolute) {
-    cssText = replaceUrlsInCssText(cssText, baseUrl, keepAbsolute, CSS_URL_REGEXP);
-    return replaceUrlsInCssText(cssText, baseUrl, keepAbsolute, CSS_IMPORT_REGEXP);
-  },
-  resolveAttributes: function(root, url) {
-    if (root.hasAttributes && root.hasAttributes()) {
-      this.resolveElementAttributes(root, url);
-    }
-    // search for attributes that host urls
-    var nodes = root && root.querySelectorAll(URL_ATTRS_SELECTOR);
-    if (nodes) {
-      for (var i = 0, l = nodes.length, n; (i < l) && (n = nodes[i]); i++) {
-        this.resolveElementAttributes(n, url);
-      }
-    }
-  },
-  resolveElementAttributes: function(node, url) {
-    url = url || baseUrl(node);
-    URL_ATTRS.forEach(function(v) {
-      var attr = node.attributes[v];
-      var value = attr && attr.value;
-      var replacement;
-      if (value && value.search(URL_TEMPLATE_SEARCH) < 0) {
-        if (v === 'style') {
-          replacement = replaceUrlsInCssText(value, url, false, CSS_URL_REGEXP);
-        } else {
-          replacement = resolveRelativeUrl(url, value);
-        }
-        attr.value = replacement;
-      }
-    });
-  }
-};
-
-var CSS_URL_REGEXP = /(url\()([^)]*)(\))/g;
-var CSS_IMPORT_REGEXP = /(@import[\s]+(?!url\())([^;]*)(;)/g;
-var URL_ATTRS = ['href', 'src', 'action', 'style', 'url'];
-var URL_ATTRS_SELECTOR = '[' + URL_ATTRS.join('],[') + ']';
-var URL_TEMPLATE_SEARCH = '{{.*}}';
-var URL_HASH = '#';
-
-function baseUrl(node) {
-  var u = new URL(node.ownerDocument.baseURI);
-  u.search = '';
-  u.hash = '';
-  return u;
-}
-
-function replaceUrlsInCssText(cssText, baseUrl, keepAbsolute, regexp) {
-  return cssText.replace(regexp, function(m, pre, url, post) {
-    var urlPath = url.replace(/["']/g, '');
-    urlPath = resolveRelativeUrl(baseUrl, urlPath, keepAbsolute);
-    return pre + '\'' + urlPath + '\'' + post;
-  });
-}
-
-function resolveRelativeUrl(baseUrl, url, keepAbsolute) {
-  // do not resolve '/' absolute urls
-  if (url && url[0] === '/') {
-    return url;
-  }
-  // do not resolve '#' links, they are used for routing
-  if (url && url[0] === '#') {
-    return url;
-  }
-  var u = new URL(url, baseUrl);
-  return keepAbsolute ? u.href : makeDocumentRelPath(u.href);
-}
-
-function makeDocumentRelPath(url) {
-  var root = baseUrl(document.documentElement);
-  var u = new URL(url, root);
-  if (u.host === root.host && u.port === root.port &&
-      u.protocol === root.protocol) {
-    return makeRelPath(root, u);
-  } else {
-    return url;
-  }
-}
-
-// make a relative path from source to target
-function makeRelPath(sourceUrl, targetUrl) {
-  var source = sourceUrl.pathname;
-  var target = targetUrl.pathname;
-  var s = source.split('/');
-  var t = target.split('/');
-  while (s.length && s[0] === t[0]){
-    s.shift();
-    t.shift();
-  }
-  for (var i = 0, l = s.length - 1; i < l; i++) {
-    t.unshift('..');
-  }
-  // empty '#' is discarded but we need to preserve it.
-  var hash = (targetUrl.href.slice(-1) === URL_HASH) ? URL_HASH : targetUrl.hash;
-  return t.join('/') + targetUrl.search + hash;
-}
-
-// exports
-scope.urlResolver = urlResolver;
-
-})(Polymer);
-
-(function(scope) {
-  var endOfMicrotask = Polymer.endOfMicrotask;
-
-  // Generic url loader
-  function Loader(regex) {
-    this.cache = Object.create(null);
-    this.map = Object.create(null);
-    this.requests = 0;
-    this.regex = regex;
-  }
-  Loader.prototype = {
-
-    // TODO(dfreedm): there may be a better factoring here
-    // extract absolute urls from the text (full of relative urls)
-    extractUrls: function(text, base) {
-      var matches = [];
-      var matched, u;
-      while ((matched = this.regex.exec(text))) {
-        u = new URL(matched[1], base);
-        matches.push({matched: matched[0], url: u.href});
-      }
-      return matches;
-    },
-    // take a text blob, a root url, and a callback and load all the urls found within the text
-    // returns a map of absolute url to text
-    process: function(text, root, callback) {
-      var matches = this.extractUrls(text, root);
-
-      // every call to process returns all the text this loader has ever received
-      var done = callback.bind(null, this.map);
-      this.fetch(matches, done);
-    },
-    // build a mapping of url -> text from matches
-    fetch: function(matches, callback) {
-      var inflight = matches.length;
-
-      // return early if there is no fetching to be done
-      if (!inflight) {
-        return callback();
-      }
-
-      // wait for all subrequests to return
-      var done = function() {
-        if (--inflight === 0) {
-          callback();
-        }
-      };
-
-      // start fetching all subrequests
-      var m, req, url;
-      for (var i = 0; i < inflight; i++) {
-        m = matches[i];
-        url = m.url;
-        req = this.cache[url];
-        // if this url has already been requested, skip requesting it again
-        if (!req) {
-          req = this.xhr(url);
-          req.match = m;
-          this.cache[url] = req;
-        }
-        // wait for the request to process its subrequests
-        req.wait(done);
-      }
-    },
-    handleXhr: function(request) {
-      var match = request.match;
-      var url = match.url;
-
-      // handle errors with an empty string
-      var response = request.response || request.responseText || '';
-      this.map[url] = response;
-      this.fetch(this.extractUrls(response, url), request.resolve);
-    },
-    xhr: function(url) {
-      this.requests++;
-      var request = new XMLHttpRequest();
-      request.open('GET', url, true);
-      request.send();
-      request.onerror = request.onload = this.handleXhr.bind(this, request);
-
-      // queue of tasks to run after XHR returns
-      request.pending = [];
-      request.resolve = function() {
-        var pending = request.pending;
-        for(var i = 0; i < pending.length; i++) {
-          pending[i]();
-        }
-        request.pending = null;
-      };
-
-      // if we have already resolved, pending is null, async call the callback
-      request.wait = function(fn) {
-        if (request.pending) {
-          request.pending.push(fn);
-        } else {
-          endOfMicrotask(fn);
-        }
-      };
-
-      return request;
-    }
-  };
-
-  scope.Loader = Loader;
-})(Polymer);
-
-(function(scope) {
-
-var urlResolver = scope.urlResolver;
-var Loader = scope.Loader;
-
-function StyleResolver() {
-  this.loader = new Loader(this.regex);
-}
-StyleResolver.prototype = {
-  regex: /@import\s+(?:url)?["'\(]*([^'"\)]*)['"\)]*;/g,
-  // Recursively replace @imports with the text at that url
-  resolve: function(text, url, callback) {
-    var done = function(map) {
-      callback(this.flatten(text, url, map));
-    }.bind(this);
-    this.loader.process(text, url, done);
-  },
-  // resolve the textContent of a style node
-  resolveNode: function(style, url, callback) {
-    var text = style.textContent;
-    var done = function(text) {
-      style.textContent = text;
-      callback(style);
-    };
-    this.resolve(text, url, done);
-  },
-  // flatten all the @imports to text
-  flatten: function(text, base, map) {
-    var matches = this.loader.extractUrls(text, base);
-    var match, url, intermediate;
-    for (var i = 0; i < matches.length; i++) {
-      match = matches[i];
-      url = match.url;
-      // resolve any css text to be relative to the importer, keep absolute url
-      intermediate = urlResolver.resolveCssText(map[url], url, true);
-      // flatten intermediate @imports
-      intermediate = this.flatten(intermediate, base, map);
-      text = text.replace(match.matched, intermediate);
-    }
-    return text;
-  },
-  loadStyles: function(styles, base, callback) {
-    var loaded=0, l = styles.length;
-    // called in the context of the style
-    function loadedStyle(style) {
-      loaded++;
-      if (loaded === l && callback) {
-        callback();
-      }
-    }
-    for (var i=0, s; (i<l) && (s=styles[i]); i++) {
-      this.resolveNode(s, base, loadedStyle);
-    }
-  }
-};
-
-var styleResolver = new StyleResolver();
-
-// exports
-scope.styleResolver = styleResolver;
-
-})(Polymer);
-
-(function(scope) {
-
-  // copy own properties from 'api' to 'prototype, with name hinting for 'super'
-  function extend(prototype, api) {
-    if (prototype && api) {
-      // use only own properties of 'api'
-      Object.getOwnPropertyNames(api).forEach(function(n) {
-        // acquire property descriptor
-        var pd = Object.getOwnPropertyDescriptor(api, n);
-        if (pd) {
-          // clone property via descriptor
-          Object.defineProperty(prototype, n, pd);
-          // cache name-of-method for 'super' engine
-          if (typeof pd.value == 'function') {
-            // hint the 'super' engine
-            pd.value.nom = n;
-          }
-        }
-      });
-    }
-    return prototype;
-  }
-
-
-  // mixin
-
-  // copy all properties from inProps (et al) to inObj
-  function mixin(inObj/*, inProps, inMoreProps, ...*/) {
-    var obj = inObj || {};
-    for (var i = 1; i < arguments.length; i++) {
-      var p = arguments[i];
-      try {
-        for (var n in p) {
-          copyProperty(n, p, obj);
-        }
-      } catch(x) {
-      }
-    }
-    return obj;
-  }
-
-  // copy property inName from inSource object to inTarget object
-  function copyProperty(inName, inSource, inTarget) {
-    var pd = getPropertyDescriptor(inSource, inName);
-    Object.defineProperty(inTarget, inName, pd);
-  }
-
-  // get property descriptor for inName on inObject, even if
-  // inName exists on some link in inObject's prototype chain
-  function getPropertyDescriptor(inObject, inName) {
-    if (inObject) {
-      var pd = Object.getOwnPropertyDescriptor(inObject, inName);
-      return pd || getPropertyDescriptor(Object.getPrototypeOf(inObject), inName);
-    }
-  }
-
-  // exports
-
-  scope.extend = extend;
-  scope.mixin = mixin;
-
-  // for bc
-  Platform.mixin = mixin;
-
-})(Polymer);
-
-(function(scope) {
-  
-  // usage
-  
-  // invoke cb.call(this) in 100ms, unless the job is re-registered,
-  // which resets the timer
-  // 
-  // this.myJob = this.job(this.myJob, cb, 100)
-  //
-  // returns a job handle which can be used to re-register a job
-
-  var Job = function(inContext) {
-    this.context = inContext;
-    this.boundComplete = this.complete.bind(this)
-  };
-  Job.prototype = {
-    go: function(callback, wait) {
-      this.callback = callback;
-      var h;
-      if (!wait) {
-        h = requestAnimationFrame(this.boundComplete);
-        this.handle = function() {
-          cancelAnimationFrame(h);
-        }
-      } else {
-        h = setTimeout(this.boundComplete, wait);
-        this.handle = function() {
-          clearTimeout(h);
-        }
-      }
-    },
-    stop: function() {
-      if (this.handle) {
-        this.handle();
-        this.handle = null;
-      }
-    },
-    complete: function() {
-      if (this.handle) {
-        this.stop();
-        this.callback.call(this.context);
-      }
-    }
-  };
-  
-  function job(job, callback, wait) {
-    if (job) {
-      job.stop();
-    } else {
-      job = new Job(this);
-    }
-    job.go(callback, wait);
-    return job;
-  }
-  
-  // exports 
-
-  scope.job = job;
-  
-})(Polymer);
-
-(function(scope) {
-
-  // dom polyfill, additions, and utility methods
-
-  var registry = {};
-
-  HTMLElement.register = function(tag, prototype) {
-    registry[tag] = prototype;
-  };
-
-  // get prototype mapped to node <tag>
-  HTMLElement.getPrototypeForTag = function(tag) {
-    var prototype = !tag ? HTMLElement.prototype : registry[tag];
-    // TODO(sjmiles): creating <tag> is likely to have wasteful side-effects
-    return prototype || Object.getPrototypeOf(document.createElement(tag));
-  };
-
-  // we have to flag propagation stoppage for the event dispatcher
-  var originalStopPropagation = Event.prototype.stopPropagation;
-  Event.prototype.stopPropagation = function() {
-    this.cancelBubble = true;
-    originalStopPropagation.apply(this, arguments);
-  };
-  
-  
-  // polyfill DOMTokenList
-  // * add/remove: allow these methods to take multiple classNames
-  // * toggle: add a 2nd argument which forces the given state rather
-  //  than toggling.
-
-  var add = DOMTokenList.prototype.add;
-  var remove = DOMTokenList.prototype.remove;
-  DOMTokenList.prototype.add = function() {
-    for (var i = 0; i < arguments.length; i++) {
-      add.call(this, arguments[i]);
-    }
-  };
-  DOMTokenList.prototype.remove = function() {
-    for (var i = 0; i < arguments.length; i++) {
-      remove.call(this, arguments[i]);
-    }
-  };
-  DOMTokenList.prototype.toggle = function(name, bool) {
-    if (arguments.length == 1) {
-      bool = !this.contains(name);
-    }
-    bool ? this.add(name) : this.remove(name);
-  };
-  DOMTokenList.prototype.switch = function(oldName, newName) {
-    oldName && this.remove(oldName);
-    newName && this.add(newName);
-  };
-
-  // add array() to NodeList, NamedNodeMap, HTMLCollection
-
-  var ArraySlice = function() {
-    return Array.prototype.slice.call(this);
-  };
-
-  var namedNodeMap = (window.NamedNodeMap || window.MozNamedAttrMap || {});
-
-  NodeList.prototype.array = ArraySlice;
-  namedNodeMap.prototype.array = ArraySlice;
-  HTMLCollection.prototype.array = ArraySlice;
-
-  // utility
-
-  function createDOM(inTagOrNode, inHTML, inAttrs) {
-    var dom = typeof inTagOrNode == 'string' ?
-        document.createElement(inTagOrNode) : inTagOrNode.cloneNode(true);
-    dom.innerHTML = inHTML;
-    if (inAttrs) {
-      for (var n in inAttrs) {
-        dom.setAttribute(n, inAttrs[n]);
-      }
-    }
-    return dom;
-  }
-
-  // exports
-
-  scope.createDOM = createDOM;
-
-})(Polymer);
-
-(function(scope) {
-    // super
-
-    // `arrayOfArgs` is an optional array of args like one might pass
-    // to `Function.apply`
-
-    // TODO(sjmiles):
-    //    $super must be installed on an instance or prototype chain
-    //    as `super`, and invoked via `this`, e.g.
-    //      `this.super();`
-
-    //    will not work if function objects are not unique, for example,
-    //    when using mixins.
-    //    The memoization strategy assumes each function exists on only one 
-    //    prototype chain i.e. we use the function object for memoizing)
-    //    perhaps we can bookkeep on the prototype itself instead
-    function $super(arrayOfArgs) {
-      // since we are thunking a method call, performance is important here: 
-      // memoize all lookups, once memoized the fast path calls no other 
-      // functions
-      //
-      // find the caller (cannot be `strict` because of 'caller')
-      var caller = $super.caller;
-      // memoized 'name of method' 
-      var nom = caller.nom;
-      // memoized next implementation prototype
-      var _super = caller._super;
-      if (!_super) {
-        if (!nom) {
-          nom = caller.nom = nameInThis.call(this, caller);
-        }
-        if (!nom) {
-          console.warn('called super() on a method not installed declaratively (has no .nom property)');
-        }
-        // super prototype is either cached or we have to find it
-        // by searching __proto__ (at the 'top')
-        // invariant: because we cache _super on fn below, we never reach 
-        // here from inside a series of calls to super(), so it's ok to 
-        // start searching from the prototype of 'this' (at the 'top')
-        // we must never memoize a null super for this reason
-        _super = memoizeSuper(caller, nom, getPrototypeOf(this));
-      }
-      // our super function
-      var fn = _super[nom];
-      if (fn) {
-        // memoize information so 'fn' can call 'super'
-        if (!fn._super) {
-          // must not memoize null, or we lose our invariant above
-          memoizeSuper(fn, nom, _super);
-        }
-        // invoke the inherited method
-        // if 'fn' is not function valued, this will throw
-        return fn.apply(this, arrayOfArgs || []);
-      }
-    }
-
-    function nameInThis(value) {
-      var p = this.__proto__;
-      while (p && p !== HTMLElement.prototype) {
-        // TODO(sjmiles): getOwnPropertyNames is absurdly expensive
-        var n$ = Object.getOwnPropertyNames(p);
-        for (var i=0, l=n$.length, n; i<l && (n=n$[i]); i++) {
-          var d = Object.getOwnPropertyDescriptor(p, n);
-          if (typeof d.value === 'function' && d.value === value) {
-            return n;
-          }
-        }
-        p = p.__proto__;
-      }
-    }
-
-    function memoizeSuper(method, name, proto) {
-      // find and cache next prototype containing `name`
-      // we need the prototype so we can do another lookup
-      // from here
-      var s = nextSuper(proto, name, method);
-      if (s[name]) {
-        // `s` is a prototype, the actual method is `s[name]`
-        // tag super method with it's name for quicker lookups
-        s[name].nom = name;
-      }
-      return method._super = s;
-    }
-
-    function nextSuper(proto, name, caller) {
-      // look for an inherited prototype that implements name
-      while (proto) {
-        if ((proto[name] !== caller) && proto[name]) {
-          return proto;
-        }
-        proto = getPrototypeOf(proto);
-      }
-      // must not return null, or we lose our invariant above
-      // in this case, a super() call was invoked where no superclass
-      // method exists
-      // TODO(sjmiles): thow an exception?
-      return Object;
-    }
-
-    // NOTE: In some platforms (IE10) the prototype chain is faked via 
-    // __proto__. Therefore, always get prototype via __proto__ instead of
-    // the more standard Object.getPrototypeOf.
-    function getPrototypeOf(prototype) {
-      return prototype.__proto__;
-    }
-
-    // utility function to precompute name tags for functions
-    // in a (unchained) prototype
-    function hintSuper(prototype) {
-      // tag functions with their prototype name to optimize
-      // super call invocations
-      for (var n in prototype) {
-        var pd = Object.getOwnPropertyDescriptor(prototype, n);
-        if (pd && typeof pd.value === 'function') {
-          pd.value.nom = n;
-        }
-      }
-    }
-
-    // exports
-
-    scope.super = $super;
-
-})(Polymer);
-
-(function(scope) {
-
-  function noopHandler(value) {
-    return value;
-  }
-
-  // helper for deserializing properties of various types to strings
-  var typeHandlers = {
-    string: noopHandler,
-    'undefined': noopHandler,
-    date: function(value) {
-      return new Date(Date.parse(value) || Date.now());
-    },
-    boolean: function(value) {
-      if (value === '') {
-        return true;
-      }
-      return value === 'false' ? false : !!value;
-    },
-    number: function(value) {
-      var n = parseFloat(value);
-      // hex values like "0xFFFF" parseFloat as 0
-      if (n === 0) {
-        n = parseInt(value);
-      }
-      return isNaN(n) ? value : n;
-      // this code disabled because encoded values (like "0xFFFF")
-      // do not round trip to their original format
-      //return (String(floatVal) === value) ? floatVal : value;
-    },
-    object: function(value, currentValue) {
-      if (currentValue === null) {
-        return value;
-      }
-      try {
-        // If the string is an object, we can parse is with the JSON library.
-        // include convenience replace for single-quotes. If the author omits
-        // quotes altogether, parse will fail.
-        return JSON.parse(value.replace(/'/g, '"'));
-      } catch(e) {
-        // The object isn't valid JSON, return the raw value
-        return value;
-      }
-    },
-    // avoid deserialization of functions
-    'function': function(value, currentValue) {
-      return currentValue;
-    }
-  };
-
-  function deserializeValue(value, currentValue) {
-    // attempt to infer type from default value
-    var inferredType = typeof currentValue;
-    // invent 'date' type value for Date
-    if (currentValue instanceof Date) {
-      inferredType = 'date';
-    }
-    // delegate deserialization via type string
-    return typeHandlers[inferredType](value, currentValue);
-  }
-
-  // exports
-
-  scope.deserializeValue = deserializeValue;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var extend = scope.extend;
-
-  // module
-
-  var api = {};
-
-  api.declaration = {};
-  api.instance = {};
-
-  api.publish = function(apis, prototype) {
-    for (var n in apis) {
-      extend(prototype, apis[n]);
-    }
-  };
-
-  // exports
-
-  scope.api = api;
-
-})(Polymer);
-
-(function(scope) {
-
-  /**
-   * @class polymer-base
-   */
-
-  var utils = {
-
-    /**
-      * Invokes a function asynchronously. The context of the callback
-      * function is bound to 'this' automatically. Returns a handle which may 
-      * be passed to <a href="#cancelAsync">cancelAsync</a> to cancel the 
-      * asynchronous call.
-      *
-      * @method async
-      * @param {Function|String} method
-      * @param {any|Array} args
-      * @param {number} timeout
-      */
-    async: function(method, args, timeout) {
-      // when polyfilling Object.observe, ensure changes 
-      // propagate before executing the async method
-      Polymer.flush();
-      // second argument to `apply` must be an array
-      args = (args && args.length) ? args : [args];
-      // function to invoke
-      var fn = function() {
-        (this[method] || method).apply(this, args);
-      }.bind(this);
-      // execute `fn` sooner or later
-      var handle = timeout ? setTimeout(fn, timeout) :
-          requestAnimationFrame(fn);
-      // NOTE: switch on inverting handle to determine which time is used.
-      return timeout ? handle : ~handle;
-    },
-
-    /**
-      * Cancels a pending callback that was scheduled via 
-      * <a href="#async">async</a>. 
-      *
-      * @method cancelAsync
-      * @param {handle} handle Handle of the `async` to cancel.
-      */
-    cancelAsync: function(handle) {
-      if (handle < 0) {
-        cancelAnimationFrame(~handle);
-      } else {
-        clearTimeout(handle);
-      }
-    },
-
-    /**
-      * Fire an event.
-      *
-      * @method fire
-      * @returns {Object} event
-      * @param {string} type An event name.
-      * @param {any} detail
-      * @param {Node} onNode Target node.
-      * @param {Boolean} bubbles Set false to prevent bubbling, defaults to true
-      * @param {Boolean} cancelable Set false to prevent cancellation, defaults to true
-      */
-    fire: function(type, detail, onNode, bubbles, cancelable) {
-      var node = onNode || this;
-      var detail = detail === null || detail === undefined ? {} : detail;
-      var event = new CustomEvent(type, {
-        bubbles: bubbles !== undefined ? bubbles : true,
-        cancelable: cancelable !== undefined ? cancelable : true,
-        detail: detail
-      });
-      node.dispatchEvent(event);
-      return event;
-    },
-
-    /**
-      * Fire an event asynchronously.
-      *
-      * @method asyncFire
-      * @param {string} type An event name.
-      * @param detail
-      * @param {Node} toNode Target node.
-      */
-    asyncFire: function(/*inType, inDetail*/) {
-      this.async("fire", arguments);
-    },
-
-    /**
-      * Remove class from old, add class to anew, if they exist.
-      *
-      * @param classFollows
-      * @param anew A node.
-      * @param old A node
-      * @param className
-      */
-    classFollows: function(anew, old, className) {
-      if (old) {
-        old.classList.remove(className);
-      }
-      if (anew) {
-        anew.classList.add(className);
-      }
-    },
-
-    /**
-      * Inject HTML which contains markup bound to this element into
-      * a target element (replacing target element content).
-      *
-      * @param String html to inject
-      * @param Element target element
-      */
-    injectBoundHTML: function(html, element) {
-      var template = document.createElement('template');
-      template.innerHTML = html;
-      var fragment = this.instanceTemplate(template);
-      if (element) {
-        element.textContent = '';
-        element.appendChild(fragment);
-      }
-      return fragment;
-    }
-  };
-
-  // no-operation function for handy stubs
-  var nop = function() {};
-
-  // null-object for handy stubs
-  var nob = {};
-
-  // deprecated
-
-  utils.asyncMethod = utils.async;
-
-  // exports
-
-  scope.api.instance.utils = utils;
-  scope.nop = nop;
-  scope.nob = nob;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-  var EVENT_PREFIX = 'on-';
-
-  // instance events api
-  var events = {
-    // read-only
-    EVENT_PREFIX: EVENT_PREFIX,
-    // event listeners on host
-    addHostListeners: function() {
-      var events = this.eventDelegates;
-      log.events && (Object.keys(events).length > 0) && console.log('[%s] addHostListeners:', this.localName, events);
-      // NOTE: host events look like bindings but really are not;
-      // (1) we don't want the attribute to be set and (2) we want to support
-      // multiple event listeners ('host' and 'instance') and Node.bind
-      // by default supports 1 thing being bound.
-      for (var type in events) {
-        var methodName = events[type];
-        PolymerGestures.addEventListener(this, type, this.element.getEventHandler(this, this, methodName));
-      }
-    },
-    // call 'method' or function method on 'obj' with 'args', if the method exists
-    dispatchMethod: function(obj, method, args) {
-      if (obj) {
-        log.events && console.group('[%s] dispatch [%s]', obj.localName, method);
-        var fn = typeof method === 'function' ? method : obj[method];
-        if (fn) {
-          fn[args ? 'apply' : 'call'](obj, args);
-        }
-        log.events && console.groupEnd();
-        // NOTE: dirty check right after calling method to ensure 
-        // changes apply quickly; in a very complicated app using high 
-        // frequency events, this can be a perf concern; in this case,
-        // imperative handlers can be used to avoid flushing.
-        Polymer.flush();
-      }
-    }
-  };
-
-  // exports
-
-  scope.api.instance.events = events;
-
-  /**
-   * @class Polymer
-   */
-
-  /**
-   * Add a gesture aware event handler to the given `node`. Can be used 
-   * in place of `element.addEventListener` and ensures gestures will function
-   * as expected on mobile platforms. Please note that Polymer's declarative
-   * event handlers include this functionality by default.
-   * 
-   * @method addEventListener
-   * @param {Node} node node on which to listen
-   * @param {String} eventType name of the event
-   * @param {Function} handlerFn event handler function
-   * @param {Boolean} capture set to true to invoke event capturing
-   * @type Function
-   */
-  // alias PolymerGestures event listener logic
-  scope.addEventListener = function(node, eventType, handlerFn, capture) {
-    PolymerGestures.addEventListener(wrap(node), eventType, handlerFn, capture);
-  };
-
-  /**
-   * Remove a gesture aware event handler on the given `node`. To remove an
-   * event listener, the exact same arguments are required that were passed
-   * to `Polymer.addEventListener`.
-   * 
-   * @method removeEventListener
-   * @param {Node} node node on which to listen
-   * @param {String} eventType name of the event
-   * @param {Function} handlerFn event handler function
-   * @param {Boolean} capture set to true to invoke event capturing
-   * @type Function
-   */
-  scope.removeEventListener = function(node, eventType, handlerFn, capture) {
-    PolymerGestures.removeEventListener(wrap(node), eventType, handlerFn, capture);
-  };
-
-})(Polymer);
-
-(function(scope) {
-
-  // instance api for attributes
-
-  var attributes = {
-    // copy attributes defined in the element declaration to the instance
-    // e.g. <polymer-element name="x-foo" tabIndex="0"> tabIndex is copied
-    // to the element instance here.
-    copyInstanceAttributes: function () {
-      var a$ = this._instanceAttributes;
-      for (var k in a$) {
-        if (!this.hasAttribute(k)) {
-          this.setAttribute(k, a$[k]);
-        }
-      }
-    },
-    // for each attribute on this, deserialize value to property as needed
-    takeAttributes: function() {
-      // if we have no publish lookup table, we have no attributes to take
-      // TODO(sjmiles): ad hoc
-      if (this._publishLC) {
-        for (var i=0, a$=this.attributes, l=a$.length, a; (a=a$[i]) && i<l; i++) {
-          this.attributeToProperty(a.name, a.value);
-        }
-      }
-    },
-    // if attribute 'name' is mapped to a property, deserialize
-    // 'value' into that property
-    attributeToProperty: function(name, value) {
-      // try to match this attribute to a property (attributes are
-      // all lower-case, so this is case-insensitive search)
-      var name = this.propertyForAttribute(name);
-      if (name) {
-        // filter out 'mustached' values, these are to be
-        // replaced with bound-data and are not yet values
-        // themselves
-        if (value && value.search(scope.bindPattern) >= 0) {
-          return;
-        }
-        // get original value
-        var currentValue = this[name];
-        // deserialize Boolean or Number values from attribute
-        var value = this.deserializeValue(value, currentValue);
-        // only act if the value has changed
-        if (value !== currentValue) {
-          // install new value (has side-effects)
-          this[name] = value;
-        }
-      }
-    },
-    // return the published property matching name, or undefined
-    propertyForAttribute: function(name) {
-      var match = this._publishLC && this._publishLC[name];
-      return match;
-    },
-    // convert representation of `stringValue` based on type of `currentValue`
-    deserializeValue: function(stringValue, currentValue) {
-      return scope.deserializeValue(stringValue, currentValue);
-    },
-    // convert to a string value based on the type of `inferredType`
-    serializeValue: function(value, inferredType) {
-      if (inferredType === 'boolean') {
-        return value ? '' : undefined;
-      } else if (inferredType !== 'object' && inferredType !== 'function'
-          && value !== undefined) {
-        return value;
-      }
-    },
-    // serializes `name` property value and updates the corresponding attribute
-    // note that reflection is opt-in.
-    reflectPropertyToAttribute: function(name) {
-      var inferredType = typeof this[name];
-      // try to intelligently serialize property value
-      var serializedValue = this.serializeValue(this[name], inferredType);
-      // boolean properties must reflect as boolean attributes
-      if (serializedValue !== undefined) {
-        this.setAttribute(name, serializedValue);
-        // TODO(sorvell): we should remove attr for all properties
-        // that have undefined serialization; however, we will need to
-        // refine the attr reflection system to achieve this; pica, for example,
-        // relies on having inferredType object properties not removed as
-        // attrs.
-      } else if (inferredType === 'boolean') {
-        this.removeAttribute(name);
-      }
-    }
-  };
-
-  // exports
-
-  scope.api.instance.attributes = attributes;
-
-})(Polymer);
-
-(function(scope) {
-
-  /**
-   * @class polymer-base
-   */
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-
-  // magic words
-
-  var OBSERVE_SUFFIX = 'Changed';
-
-  // element api
-
-  var empty = [];
-
-  var updateRecord = {
-    object: undefined,
-    type: 'update',
-    name: undefined,
-    oldValue: undefined
-  };
-
-  var numberIsNaN = Number.isNaN || function(value) {
-    return typeof value === 'number' && isNaN(value);
-  };
-
-  function areSameValue(left, right) {
-    if (left === right)
-      return left !== 0 || 1 / left === 1 / right;
-    if (numberIsNaN(left) && numberIsNaN(right))
-      return true;
-    return left !== left && right !== right;
-  }
-
-  // capture A's value if B's value is null or undefined,
-  // otherwise use B's value
-  function resolveBindingValue(oldValue, value) {
-    if (value === undefined && oldValue === null) {
-      return value;
-    }
-    return (value === null || value === undefined) ? oldValue : value;
-  }
-
-  var properties = {
-
-    // creates a CompoundObserver to observe property changes
-    // NOTE, this is only done there are any properties in the `observe` object
-    createPropertyObserver: function() {
-      var n$ = this._observeNames;
-      if (n$ && n$.length) {
-        var o = this._propertyObserver = new CompoundObserver(true);
-        this.registerObserver(o);
-        // TODO(sorvell): may not be kosher to access the value here (this[n]);
-        // previously we looked at the descriptor on the prototype
-        // this doesn't work for inheritance and not for accessors without
-        // a value property
-        for (var i=0, l=n$.length, n; (i<l) && (n=n$[i]); i++) {
-          o.addPath(this, n);
-          this.observeArrayValue(n, this[n], null);
-        }
-      }
-    },
-
-    // start observing property changes
-    openPropertyObserver: function() {
-      if (this._propertyObserver) {
-        this._propertyObserver.open(this.notifyPropertyChanges, this);
-      }
-    },
-
-    // handler for property changes; routes changes to observing methods
-    // note: array valued properties are observed for array splices
-    notifyPropertyChanges: function(newValues, oldValues, paths) {
-      var name, method, called = {};
-      for (var i in oldValues) {
-        // note: paths is of form [object, path, object, path]
-        name = paths[2 * i + 1];
-        method = this.observe[name];
-        if (method) {
-          var ov = oldValues[i], nv = newValues[i];
-          // observes the value if it is an array
-          this.observeArrayValue(name, nv, ov);
-          if (!called[method]) {
-            // only invoke change method if one of ov or nv is not (undefined | null)
-            if ((ov !== undefined && ov !== null) || (nv !== undefined && nv !== null)) {
-              called[method] = true;
-              // TODO(sorvell): call method with the set of values it's expecting;
-              // e.g. 'foo bar': 'invalidate' expects the new and old values for
-              // foo and bar. Currently we give only one of these and then
-              // deliver all the arguments.
-              this.invokeMethod(method, [ov, nv, arguments]);
-            }
-          }
-        }
-      }
-    },
-
-    // call method iff it exists.
-    invokeMethod: function(method, args) {
-      var fn = this[method] || method;
-      if (typeof fn === 'function') {
-        fn.apply(this, args);
-      }
-    },
-
-    /**
-     * Force any pending property changes to synchronously deliver to
-     * handlers specified in the `observe` object.
-     * Note, normally changes are processed at microtask time.
-     *
-     * @method deliverChanges
-     */
-    deliverChanges: function() {
-      if (this._propertyObserver) {
-        this._propertyObserver.deliver();
-      }
-    },
-
-    observeArrayValue: function(name, value, old) {
-      // we only care if there are registered side-effects
-      var callbackName = this.observe[name];
-      if (callbackName) {
-        // if we are observing the previous value, stop
-        if (Array.isArray(old)) {
-          log.observe && console.log('[%s] observeArrayValue: unregister observer [%s]', this.localName, name);
-          this.closeNamedObserver(name + '__array');
-        }
-        // if the new value is an array, being observing it
-        if (Array.isArray(value)) {
-          log.observe && console.log('[%s] observeArrayValue: register observer [%s]', this.localName, name, value);
-          var observer = new ArrayObserver(value);
-          observer.open(function(splices) {
-            this.invokeMethod(callbackName, [splices]);
-          }, this);
-          this.registerNamedObserver(name + '__array', observer);
-        }
-      }
-    },
-
-    emitPropertyChangeRecord: function(name, value, oldValue) {
-      var object = this;
-      if (areSameValue(value, oldValue)) {
-        return;
-      }
-      // invoke property change side effects
-      this._propertyChanged(name, value, oldValue);
-      // emit change record
-      if (!Observer.hasObjectObserve) {
-        return;
-      }
-      var notifier = this._objectNotifier;
-      if (!notifier) {
-        notifier = this._objectNotifier = Object.getNotifier(this);
-      }
-      updateRecord.object = this;
-      updateRecord.name = name;
-      updateRecord.oldValue = oldValue;
-      notifier.notify(updateRecord);
-    },
-
-    _propertyChanged: function(name, value, oldValue) {
-      if (this.reflect[name]) {
-        this.reflectPropertyToAttribute(name);
-      }
-    },
-
-    // creates a property binding (called via bind) to a published property.
-    bindProperty: function(property, observable, oneTime) {
-      if (oneTime) {
-        this[property] = observable;
-        return;
-      }
-      var computed = this.element.prototype.computed;
-      // Binding an "out-only" value to a computed property. Note that
-      // since this observer isn't opened, it doesn't need to be closed on
-      // cleanup.
-      if (computed && computed[property]) {
-        var privateComputedBoundValue = property + 'ComputedBoundObservable_';
-        this[privateComputedBoundValue] = observable;
-        return;
-      }
-      return this.bindToAccessor(property, observable, resolveBindingValue);
-    },
-
-    // NOTE property `name` must be published. This makes it an accessor.
-    bindToAccessor: function(name, observable, resolveFn) {
-      var privateName = name + '_';
-      var privateObservable  = name + 'Observable_';
-      // Present for properties which are computed and published and have a
-      // bound value.
-      var privateComputedBoundValue = name + 'ComputedBoundObservable_';
-      this[privateObservable] = observable;
-      var oldValue = this[privateName];
-      // observable callback
-      var self = this;
-      function updateValue(value, oldValue) {
-        self[privateName] = value;
-        var setObserveable = self[privateComputedBoundValue];
-        if (setObserveable && typeof setObserveable.setValue == 'function') {
-          setObserveable.setValue(value);
-        }
-        self.emitPropertyChangeRecord(name, value, oldValue);
-      }
-      // resolve initial value
-      var value = observable.open(updateValue);
-      if (resolveFn && !areSameValue(oldValue, value)) {
-        var resolvedValue = resolveFn(oldValue, value);
-        if (!areSameValue(value, resolvedValue)) {
-          value = resolvedValue;
-          if (observable.setValue) {
-            observable.setValue(value);
-          }
-        }
-      }
-      updateValue(value, oldValue);
-      // register and return observable
-      var observer = {
-        close: function() {
-          observable.close();
-          self[privateObservable] = undefined;
-          self[privateComputedBoundValue] = undefined;
-        }
-      };
-      this.registerObserver(observer);
-      return observer;
-    },
-
-    createComputedProperties: function() {
-      if (!this._computedNames) {
-        return;
-      }
-      for (var i = 0; i < this._computedNames.length; i++) {
-        var name = this._computedNames[i];
-        var expressionText = this.computed[name];
-        try {
-          var expression = PolymerExpressions.getExpression(expressionText);
-          var observable = expression.getBinding(this, this.element.syntax);
-          this.bindToAccessor(name, observable);
-        } catch (ex) {
-          console.error('Failed to create computed property', ex);
-        }
-      }
-    },
-
-    // property bookkeeping
-    registerObserver: function(observer) {
-      if (!this._observers) {
-        this._observers = [observer];
-        return;
-      }
-      this._observers.push(observer);
-    },
-
-    closeObservers: function() {
-      if (!this._observers) {
-        return;
-      }
-      // observer array items are arrays of observers.
-      var observers = this._observers;
-      for (var i = 0; i < observers.length; i++) {
-        var observer = observers[i];
-        if (observer && typeof observer.close == 'function') {
-          observer.close();
-        }
-      }
-      this._observers = [];
-    },
-
-    // bookkeeping observers for memory management
-    registerNamedObserver: function(name, observer) {
-      var o$ = this._namedObservers || (this._namedObservers = {});
-      o$[name] = observer;
-    },
-
-    closeNamedObserver: function(name) {
-      var o$ = this._namedObservers;
-      if (o$ && o$[name]) {
-        o$[name].close();
-        o$[name] = null;
-        return true;
-      }
-    },
-
-    closeNamedObservers: function() {
-      if (this._namedObservers) {
-        for (var i in this._namedObservers) {
-          this.closeNamedObserver(i);
-        }
-        this._namedObservers = {};
-      }
-    }
-
-  };
-
-  // logging
-  var LOG_OBSERVE = '[%s] watching [%s]';
-  var LOG_OBSERVED = '[%s#%s] watch: [%s] now [%s] was [%s]';
-  var LOG_CHANGED = '[%s#%s] propertyChanged: [%s] now [%s] was [%s]';
-
-  // exports
-
-  scope.api.instance.properties = properties;
-
-})(Polymer);
-
-(function(scope) {
-
-  /**
-   * @class polymer-base
-   */
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-
-  // element api supporting mdv
-  var mdv = {
-
-    /**
-     * Creates dom cloned from the given template, instantiating bindings
-     * with this element as the template model and `PolymerExpressions` as the
-     * binding delegate.
-     *
-     * @method instanceTemplate
-     * @param {Template} template source template from which to create dom.
-     */
-    instanceTemplate: function(template) {
-      // ensure template is decorated (lets' things like <tr template ...> work)
-      HTMLTemplateElement.decorate(template);
-      // ensure a default bindingDelegate
-      var syntax = this.syntax || (!template.bindingDelegate &&
-          this.element.syntax);
-      var dom = template.createInstance(this, syntax);
-      var observers = dom.bindings_;
-      for (var i = 0; i < observers.length; i++) {
-        this.registerObserver(observers[i]);
-      }
-      return dom;
-    },
-
-    // Called by TemplateBinding/NodeBind to setup a binding to the given
-    // property. It's overridden here to support property bindings
-    // in addition to attribute bindings that are supported by default.
-    bind: function(name, observable, oneTime) {
-      var property = this.propertyForAttribute(name);
-      if (!property) {
-        // TODO(sjmiles): this mixin method must use the special form
-        // of `super` installed by `mixinMethod` in declaration/prototype.js
-        return this.mixinSuper(arguments);
-      } else {
-        // use n-way Polymer binding
-        var observer = this.bindProperty(property, observable, oneTime);
-        // NOTE: reflecting binding information is typically required only for
-        // tooling. It has a performance cost so it's opt-in in Node.bind.
-        if (Platform.enableBindingsReflection && observer) {
-          observer.path = observable.path_;
-          this._recordBinding(property, observer);
-        }
-        if (this.reflect[property]) {
-          this.reflectPropertyToAttribute(property);
-        }
-        return observer;
-      }
-    },
-
-    _recordBinding: function(name, observer) {
-      this.bindings_ = this.bindings_ || {};
-      this.bindings_[name] = observer;
-    },
-
-    // Called by TemplateBinding when all bindings on an element have been 
-    // executed. This signals that all element inputs have been gathered
-    // and it's safe to ready the element, create shadow-root and start
-    // data-observation.
-    bindFinished: function() {
-      this.makeElementReady();
-    },
-
-    // called at detached time to signal that an element's bindings should be
-    // cleaned up. This is done asynchronously so that users have the chance
-    // to call `cancelUnbindAll` to prevent unbinding.
-    asyncUnbindAll: function() {
-      if (!this._unbound) {
-        log.unbind && console.log('[%s] asyncUnbindAll', this.localName);
-        this._unbindAllJob = this.job(this._unbindAllJob, this.unbindAll, 0);
-      }
-    },
-    
-    /**
-     * This method should rarely be used and only if 
-     * <a href="#cancelUnbindAll">`cancelUnbindAll`</a> has been called to 
-     * prevent element unbinding. In this case, the element's bindings will 
-     * not be automatically cleaned up and it cannot be garbage collected 
-     * by the system. If memory pressure is a concern or a 
-     * large amount of elements need to be managed in this way, `unbindAll`
-     * can be called to deactivate the element's bindings and allow its 
-     * memory to be reclaimed.
-     *
-     * @method unbindAll
-     */
-    unbindAll: function() {
-      if (!this._unbound) {
-        this.closeObservers();
-        this.closeNamedObservers();
-        this._unbound = true;
-      }
-    },
-
-    /**
-     * Call in `detached` to prevent the element from unbinding when it is 
-     * detached from the dom. The element is unbound as a cleanup step that 
-     * allows its memory to be reclaimed. 
-     * If `cancelUnbindAll` is used, consider calling 
-     * <a href="#unbindAll">`unbindAll`</a> when the element is no longer
-     * needed. This will allow its memory to be reclaimed.
-     * 
-     * @method cancelUnbindAll
-     */
-    cancelUnbindAll: function() {
-      if (this._unbound) {
-        log.unbind && console.warn('[%s] already unbound, cannot cancel unbindAll', this.localName);
-        return;
-      }
-      log.unbind && console.log('[%s] cancelUnbindAll', this.localName);
-      if (this._unbindAllJob) {
-        this._unbindAllJob = this._unbindAllJob.stop();
-      }
-    }
-
-  };
-
-  function unbindNodeTree(node) {
-    forNodeTree(node, _nodeUnbindAll);
-  }
-
-  function _nodeUnbindAll(node) {
-    node.unbindAll();
-  }
-
-  function forNodeTree(node, callback) {
-    if (node) {
-      callback(node);
-      for (var child = node.firstChild; child; child = child.nextSibling) {
-        forNodeTree(child, callback);
-      }
-    }
-  }
-
-  var mustachePattern = /\{\{([^{}]*)}}/;
-
-  // exports
-
-  scope.bindPattern = mustachePattern;
-  scope.api.instance.mdv = mdv;
-
-})(Polymer);
-
-(function(scope) {
-
-  /**
-   * Common prototype for all Polymer Elements.
-   * 
-   * @class polymer-base
-   * @homepage polymer.github.io
-   */
-  var base = {
-    /**
-     * Tags this object as the canonical Base prototype.
-     *
-     * @property PolymerBase
-     * @type boolean
-     * @default true
-     */
-    PolymerBase: true,
-
-    /**
-     * Debounce signals. 
-     * 
-     * Call `job` to defer a named signal, and all subsequent matching signals, 
-     * until a wait time has elapsed with no new signal.
-     * 
-     *     debouncedClickAction: function(e) {
-     *       // processClick only when it's been 100ms since the last click
-     *       this.job('click', function() {
-     *        this.processClick;
-     *       }, 100);
-     *     }
-     *
-     * @method job
-     * @param String {String} job A string identifier for the job to debounce.
-     * @param Function {Function} callback A function that is called (with `this` context) when the wait time elapses.
-     * @param Number {Number} wait Time in milliseconds (ms) after the last signal that must elapse before invoking `callback`
-     * @type Handle
-     */
-    job: function(job, callback, wait) {
-      if (typeof job === 'string') {
-        var n = '___' + job;
-        this[n] = Polymer.job.call(this, this[n], callback, wait);
-      } else {
-        // TODO(sjmiles): suggest we deprecate this call signature
-        return Polymer.job.call(this, job, callback, wait);
-      }
-    },
-
-    /**
-     * Invoke a superclass method. 
-     * 
-     * Use `super()` to invoke the most recently overridden call to the 
-     * currently executing function. 
-     * 
-     * To pass arguments through, use the literal `arguments` as the parameter 
-     * to `super()`.
-     *
-     *     nextPageAction: function(e) {
-     *       // invoke the superclass version of `nextPageAction`
-     *       this.super(arguments); 
-     *     }
-     *
-     * To pass custom arguments, arrange them in an array.
-     *
-     *     appendSerialNo: function(value, serial) {
-     *       // prefix the superclass serial number with our lot # before
-     *       // invoking the superlcass
-     *       return this.super([value, this.lotNo + serial])
-     *     }
-     *
-     * @method super
-     * @type Any
-     * @param {args) An array of arguments to use when calling the superclass method, or null.
-     */
-    super: Polymer.super,
-
-    /**
-     * Lifecycle method called when the element is instantiated.
-     * 
-     * Override `created` to perform custom create-time tasks. No need to call 
-     * super-class `created` unless you are extending another Polymer element.
-     * Created is called before the element creates `shadowRoot` or prepares
-     * data-observation.
-     * 
-     * @method created
-     * @type void
-     */
-    created: function() {
-    },
-
-    /**
-     * Lifecycle method called when the element has populated it's `shadowRoot`,
-     * prepared data-observation, and made itself ready for API interaction.
-     * 
-     * @method ready
-     * @type void
-     */
-    ready: function() {
-    },
-
-    /**
-     * Low-level lifecycle method called as part of standard Custom Elements
-     * operation. Polymer implements this method to provide basic default 
-     * functionality. For custom create-time tasks, implement `created` 
-     * instead, which is called immediately after `createdCallback`. 
-     * 
-     * @method createdCallback
-     */
-    createdCallback: function() {
-      if (this.templateInstance && this.templateInstance.model) {
-        console.warn('Attributes on ' + this.localName + ' were data bound ' +
-            'prior to Polymer upgrading the element. This may result in ' +
-            'incorrect binding types.');
-      }
-      this.created();
-      this.prepareElement();
-      if (!this.ownerDocument.isStagingDocument) {
-        this.makeElementReady();
-      }
-    },
-
-    // system entry point, do not override
-    prepareElement: function() {
-      if (this._elementPrepared) {
-        console.warn('Element already prepared', this.localName);
-        return;
-      }
-      this._elementPrepared = true;
-      // storage for shadowRoots info
-      this.shadowRoots = {};
-      // install property observers
-      this.createPropertyObserver();
-      this.openPropertyObserver();
-      // install boilerplate attributes
-      this.copyInstanceAttributes();
-      // process input attributes
-      this.takeAttributes();
-      // add event listeners
-      this.addHostListeners();
-    },
-
-    // system entry point, do not override
-    makeElementReady: function() {
-      if (this._readied) {
-        return;
-      }
-      this._readied = true;
-      this.createComputedProperties();
-      this.parseDeclarations(this.__proto__);
-      // NOTE: Support use of the `unresolved` attribute to help polyfill
-      // custom elements' `:unresolved` feature.
-      this.removeAttribute('unresolved');
-      // user entry point
-      this.ready();
-    },
-
-    /**
-     * Low-level lifecycle method called as part of standard Custom Elements
-     * operation. Polymer implements this method to provide basic default 
-     * functionality. For custom tasks in your element, implement `attributeChanged` 
-     * instead, which is called immediately after `attributeChangedCallback`. 
-     * 
-     * @method attributeChangedCallback
-     */
-    attributeChangedCallback: function(name, oldValue) {
-      // TODO(sjmiles): adhoc filter
-      if (name !== 'class' && name !== 'style') {
-        this.attributeToProperty(name, this.getAttribute(name));
-      }
-      if (this.attributeChanged) {
-        this.attributeChanged.apply(this, arguments);
-      }
-    },
-
-    /**
-     * Low-level lifecycle method called as part of standard Custom Elements
-     * operation. Polymer implements this method to provide basic default 
-     * functionality. For custom create-time tasks, implement `attached` 
-     * instead, which is called immediately after `attachedCallback`. 
-     * 
-     * @method attachedCallback
-     */
-     attachedCallback: function() {
-      // when the element is attached, prevent it from unbinding.
-      this.cancelUnbindAll();
-      // invoke user action
-      if (this.attached) {
-        this.attached();
-      }
-      if (!this.hasBeenAttached) {
-        this.hasBeenAttached = true;
-        if (this.domReady) {
-          this.async('domReady');
-        }
-      }
-    },
-
-     /**
-     * Implement to access custom elements in dom descendants, ancestors, 
-     * or siblings. Because custom elements upgrade in document order, 
-     * elements accessed in `ready` or `attached` may not be upgraded. When
-     * `domReady` is called, all registered custom elements are guaranteed
-     * to have been upgraded.
-     * 
-     * @method domReady
-     */
-
-    /**
-     * Low-level lifecycle method called as part of standard Custom Elements
-     * operation. Polymer implements this method to provide basic default 
-     * functionality. For custom create-time tasks, implement `detached` 
-     * instead, which is called immediately after `detachedCallback`. 
-     * 
-     * @method detachedCallback
-     */
-    detachedCallback: function() {
-      if (!this.preventDispose) {
-        this.asyncUnbindAll();
-      }
-      // invoke user action
-      if (this.detached) {
-        this.detached();
-      }
-      // TODO(sorvell): bc
-      if (this.leftView) {
-        this.leftView();
-      }
-    },
-
-    /**
-     * Walks the prototype-chain of this element and allows specific
-     * classes a chance to process static declarations.
-     * 
-     * In particular, each polymer-element has it's own `template`.
-     * `parseDeclarations` is used to accumulate all element `template`s
-     * from an inheritance chain.
-     *
-     * `parseDeclaration` static methods implemented in the chain are called
-     * recursively, oldest first, with the `<polymer-element>` associated
-     * with the current prototype passed as an argument.
-     * 
-     * An element may override this method to customize shadow-root generation. 
-     * 
-     * @method parseDeclarations
-     */
-    parseDeclarations: function(p) {
-      if (p && p.element) {
-        this.parseDeclarations(p.__proto__);
-        p.parseDeclaration.call(this, p.element);
-      }
-    },
-
-    /**
-     * Perform init-time actions based on static information in the
-     * `<polymer-element>` instance argument.
-     *
-     * For example, the standard implementation locates the template associated
-     * with the given `<polymer-element>` and stamps it into a shadow-root to
-     * implement shadow inheritance.
-     *  
-     * An element may override this method for custom behavior. 
-     * 
-     * @method parseDeclaration
-     */
-    parseDeclaration: function(elementElement) {
-      var template = this.fetchTemplate(elementElement);
-      if (template) {
-        var root = this.shadowFromTemplate(template);
-        this.shadowRoots[elementElement.name] = root;
-      }
-    },
-
-    /**
-     * Given a `<polymer-element>`, find an associated template (if any) to be
-     * used for shadow-root generation.
-     *
-     * An element may override this method for custom behavior. 
-     * 
-     * @method fetchTemplate
-     */
-    fetchTemplate: function(elementElement) {
-      return elementElement.querySelector('template');
-    },
-
-    /**
-     * Create a shadow-root in this host and stamp `template` as it's 
-     * content. 
-     *
-     * An element may override this method for custom behavior. 
-     * 
-     * @method shadowFromTemplate
-     */
-    shadowFromTemplate: function(template) {
-      if (template) {
-        // make a shadow root
-        var root = this.createShadowRoot();
-        // stamp template
-        // which includes parsing and applying MDV bindings before being
-        // inserted (to avoid {{}} in attribute values)
-        // e.g. to prevent <img src="images/{{icon}}"> from generating a 404.
-        var dom = this.instanceTemplate(template);
-        // append to shadow dom
-        root.appendChild(dom);
-        // perform post-construction initialization tasks on shadow root
-        this.shadowRootReady(root, template);
-        // return the created shadow root
-        return root;
-      }
-    },
-
-    // utility function that stamps a <template> into light-dom
-    lightFromTemplate: function(template, refNode) {
-      if (template) {
-        // TODO(sorvell): mark this element as an eventController so that
-        // event listeners on bound nodes inside it will be called on it.
-        // Note, the expectation here is that events on all descendants
-        // should be handled by this element.
-        this.eventController = this;
-        // stamp template
-        // which includes parsing and applying MDV bindings before being
-        // inserted (to avoid {{}} in attribute values)
-        // e.g. to prevent <img src="images/{{icon}}"> from generating a 404.
-        var dom = this.instanceTemplate(template);
-        // append to shadow dom
-        if (refNode) {
-          this.insertBefore(dom, refNode);
-        } else {
-          this.appendChild(dom);
-        }
-        // perform post-construction initialization tasks on ahem, light root
-        this.shadowRootReady(this);
-        // return the created shadow root
-        return dom;
-      }
-    },
-
-    shadowRootReady: function(root) {
-      // locate nodes with id and store references to them in this.$ hash
-      this.marshalNodeReferences(root);
-    },
-
-    // locate nodes with id and store references to them in this.$ hash
-    marshalNodeReferences: function(root) {
-      // establish $ instance variable
-      var $ = this.$ = this.$ || {};
-      // populate $ from nodes with ID from the LOCAL tree
-      if (root) {
-        var n$ = root.querySelectorAll("[id]");
-        for (var i=0, l=n$.length, n; (i<l) && (n=n$[i]); i++) {
-          $[n.id] = n;
-        };
-      }
-    },
-
-    /**
-     * Register a one-time callback when a child-list or sub-tree mutation
-     * occurs on node. 
-     *
-     * For persistent callbacks, call onMutation from your listener. 
-     * 
-     * @method onMutation
-     * @param Node {Node} node Node to watch for mutations.
-     * @param Function {Function} listener Function to call on mutation. The function is invoked as `listener.call(this, observer, mutations);` where `observer` is the MutationObserver that triggered the notification, and `mutations` is the native mutation list.
-     */
-    onMutation: function(node, listener) {
-      var observer = new MutationObserver(function(mutations) {
-        listener.call(this, observer, mutations);
-        observer.disconnect();
-      }.bind(this));
-      observer.observe(node, {childList: true, subtree: true});
-    }
-  };
-
-  /**
-   * @class Polymer
-   */
-  
-  /**
-   * Returns true if the object includes <a href="#polymer-base">polymer-base</a> in it's prototype chain.
-   * 
-   * @method isBase
-   * @param Object {Object} object Object to test.
-   * @type Boolean
-   */
-  function isBase(object) {
-    return object.hasOwnProperty('PolymerBase')
-  }
-
-  // name a base constructor for dev tools
-
-  /**
-   * The Polymer base-class constructor.
-   * 
-   * @property Base
-   * @type Function
-   */
-  function PolymerBase() {};
-  PolymerBase.prototype = base;
-  base.constructor = PolymerBase;
-
-  // exports
-
-  scope.Base = PolymerBase;
-  scope.isBase = isBase;
-  scope.api.instance.base = base;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-  var hasShadowDOMPolyfill = window.ShadowDOMPolyfill;
-
-  // magic words
-  
-  var STYLE_SCOPE_ATTRIBUTE = 'element';
-  var STYLE_CONTROLLER_SCOPE = 'controller';
-  
-  var styles = {
-    STYLE_SCOPE_ATTRIBUTE: STYLE_SCOPE_ATTRIBUTE,
-    /**
-     * Installs external stylesheets and <style> elements with the attribute 
-     * polymer-scope='controller' into the scope of element. This is intended
-     * to be a called during custom element construction.
-    */
-    installControllerStyles: function() {
-      // apply controller styles, but only if they are not yet applied
-      var scope = this.findStyleScope();
-      if (scope && !this.scopeHasNamedStyle(scope, this.localName)) {
-        // allow inherited controller styles
-        var proto = getPrototypeOf(this), cssText = '';
-        while (proto && proto.element) {
-          cssText += proto.element.cssTextForScope(STYLE_CONTROLLER_SCOPE);
-          proto = getPrototypeOf(proto);
-        }
-        if (cssText) {
-          this.installScopeCssText(cssText, scope);
-        }
-      }
-    },
-    installScopeStyle: function(style, name, scope) {
-      var scope = scope || this.findStyleScope(), name = name || '';
-      if (scope && !this.scopeHasNamedStyle(scope, this.localName + name)) {
-        var cssText = '';
-        if (style instanceof Array) {
-          for (var i=0, l=style.length, s; (i<l) && (s=style[i]); i++) {
-            cssText += s.textContent + '\n\n';
-          }
-        } else {
-          cssText = style.textContent;
-        }
-        this.installScopeCssText(cssText, scope, name);
-      }
-    },
-    installScopeCssText: function(cssText, scope, name) {
-      scope = scope || this.findStyleScope();
-      name = name || '';
-      if (!scope) {
-        return;
-      }
-      if (hasShadowDOMPolyfill) {
-        cssText = shimCssText(cssText, scope.host);
-      }
-      var style = this.element.cssTextToScopeStyle(cssText,
-          STYLE_CONTROLLER_SCOPE);
-      Polymer.applyStyleToScope(style, scope);
-      // cache that this style has been applied
-      this.styleCacheForScope(scope)[this.localName + name] = true;
-    },
-    findStyleScope: function(node) {
-      // find the shadow root that contains this element
-      var n = node || this;
-      while (n.parentNode) {
-        n = n.parentNode;
-      }
-      return n;
-    },
-    scopeHasNamedStyle: function(scope, name) {
-      var cache = this.styleCacheForScope(scope);
-      return cache[name];
-    },
-    styleCacheForScope: function(scope) {
-      if (hasShadowDOMPolyfill) {
-        var scopeName = scope.host ? scope.host.localName : scope.localName;
-        return polyfillScopeStyleCache[scopeName] || (polyfillScopeStyleCache[scopeName] = {});
-      } else {
-        return scope._scopeStyles = (scope._scopeStyles || {});
-      }
-    }
-  };
-
-  var polyfillScopeStyleCache = {};
-  
-  // NOTE: use raw prototype traversal so that we ensure correct traversal
-  // on platforms where the protoype chain is simulated via __proto__ (IE10)
-  function getPrototypeOf(prototype) {
-    return prototype.__proto__;
-  }
-
-  function shimCssText(cssText, host) {
-    var name = '', is = false;
-    if (host) {
-      name = host.localName;
-      is = host.hasAttribute('is');
-    }
-    var selector = WebComponents.ShadowCSS.makeScopeSelector(name, is);
-    return WebComponents.ShadowCSS.shimCssText(cssText, selector);
-  }
-
-  // exports
-
-  scope.api.instance.styles = styles;
-  
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var extend = scope.extend;
-  var api = scope.api;
-
-  // imperative implementation: Polymer()
-
-  // specify an 'own' prototype for tag `name`
-  function element(name, prototype) {
-    if (typeof name !== 'string') {
-      var script = prototype || document._currentScript;
-      prototype = name;
-      name = script && script.parentNode && script.parentNode.getAttribute ?
-          script.parentNode.getAttribute('name') : '';
-      if (!name) {
-        throw 'Element name could not be inferred.';
-      }
-    }
-    if (getRegisteredPrototype(name)) {
-      throw 'Already registered (Polymer) prototype for element ' + name;
-    }
-    // cache the prototype
-    registerPrototype(name, prototype);
-    // notify the registrar waiting for 'name', if any
-    notifyPrototype(name);
-  }
-
-  // async prototype source
-
-  function waitingForPrototype(name, client) {
-    waitPrototype[name] = client;
-  }
-
-  var waitPrototype = {};
-
-  function notifyPrototype(name) {
-    if (waitPrototype[name]) {
-      waitPrototype[name].registerWhenReady();
-      delete waitPrototype[name];
-    }
-  }
-
-  // utility and bookkeeping
-
-  // maps tag names to prototypes, as registered with
-  // Polymer. Prototypes associated with a tag name
-  // using document.registerElement are available from
-  // HTMLElement.getPrototypeForTag().
-  // If an element was fully registered by Polymer, then
-  // Polymer.getRegisteredPrototype(name) === 
-  //   HTMLElement.getPrototypeForTag(name)
-
-  var prototypesByName = {};
-
-  function registerPrototype(name, prototype) {
-    return prototypesByName[name] = prototype || {};
-  }
-
-  function getRegisteredPrototype(name) {
-    return prototypesByName[name];
-  }
-
-  function instanceOfType(element, type) {
-    if (typeof type !== 'string') {
-      return false;
-    }
-    var proto = HTMLElement.getPrototypeForTag(type);
-    var ctor = proto && proto.constructor;
-    if (!ctor) {
-      return false;
-    }
-    if (CustomElements.instanceof) {
-      return CustomElements.instanceof(element, ctor);
-    }
-    return element instanceof ctor;
-  }
-
-  // exports
-
-  scope.getRegisteredPrototype = getRegisteredPrototype;
-  scope.waitingForPrototype = waitingForPrototype;
-  scope.instanceOfType = instanceOfType;
-
-  // namespace shenanigans so we can expose our scope on the registration 
-  // function
-
-  // make window.Polymer reference `element()`
-
-  window.Polymer = element;
-
-  // TODO(sjmiles): find a way to do this that is less terrible
-  // copy window.Polymer properties onto `element()`
-
-  extend(Polymer, scope);
-
-  // Under the HTMLImports polyfill, scripts in the main document
-  // do not block on imports; we want to allow calls to Polymer in the main
-  // document. WebComponents collects those calls until we can process them, which
-  // we do here.
-
-  if (WebComponents.consumeDeclarations) {
-    WebComponents.consumeDeclarations(function(declarations) {
-      if (declarations) {
-        for (var i=0, l=declarations.length, d; (i<l) && (d=declarations[i]); i++) {
-          element.apply(null, d);
-        }
-      }
-    });
-  }
-
-})(Polymer);
-
-(function(scope) {
-
-/**
- * @class polymer-base
- */
-
- /**
-  * Resolve a url path to be relative to a `base` url. If unspecified, `base`
-  * defaults to the element's ownerDocument url. Can be used to resolve
-  * paths from element's in templates loaded in HTMLImports to be relative
-  * to the document containing the element. Polymer automatically does this for
-  * url attributes in element templates; however, if a url, for
-  * example, contains a binding, then `resolvePath` can be used to ensure it is 
-  * relative to the element document. For example, in an element's template,
-  *
-  *     <a href="{{resolvePath(path)}}">Resolved</a>
-  * 
-  * @method resolvePath
-  * @param {String} url Url path to resolve.
-  * @param {String} base Optional base url against which to resolve, defaults
-  * to the element's ownerDocument url.
-  * returns {String} resolved url.
-  */
-
-var path = {
-  resolveElementPaths: function(node) {
-    Polymer.urlResolver.resolveDom(node);
-  },
-  addResolvePathApi: function() {
-    // let assetpath attribute modify the resolve path
-    var assetPath = this.getAttribute('assetpath') || '';
-    var root = new URL(assetPath, this.ownerDocument.baseURI);
-    this.prototype.resolvePath = function(urlPath, base) {
-      var u = new URL(urlPath, base || root);
-      return u.href;
-    };
-  }
-};
-
-// exports
-scope.api.declaration.path = path;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-  var api = scope.api.instance.styles;
-  var STYLE_SCOPE_ATTRIBUTE = api.STYLE_SCOPE_ATTRIBUTE;
-
-  var hasShadowDOMPolyfill = window.ShadowDOMPolyfill;
-
-  // magic words
-
-  var STYLE_SELECTOR = 'style';
-  var STYLE_LOADABLE_MATCH = '@import';
-  var SHEET_SELECTOR = 'link[rel=stylesheet]';
-  var STYLE_GLOBAL_SCOPE = 'global';
-  var SCOPE_ATTR = 'polymer-scope';
-
-  var styles = {
-    // returns true if resources are loading
-    loadStyles: function(callback) {
-      var template = this.fetchTemplate();
-      var content = template && this.templateContent();
-      if (content) {
-        this.convertSheetsToStyles(content);
-        var styles = this.findLoadableStyles(content);
-        if (styles.length) {
-          var templateUrl = template.ownerDocument.baseURI;
-          return Polymer.styleResolver.loadStyles(styles, templateUrl, callback);
-        }
-      }
-      if (callback) {
-        callback();
-      }
-    },
-    convertSheetsToStyles: function(root) {
-      var s$ = root.querySelectorAll(SHEET_SELECTOR);
-      for (var i=0, l=s$.length, s, c; (i<l) && (s=s$[i]); i++) {
-        c = createStyleElement(importRuleForSheet(s, this.ownerDocument.baseURI),
-            this.ownerDocument);
-        this.copySheetAttributes(c, s);
-        s.parentNode.replaceChild(c, s);
-      }
-    },
-    copySheetAttributes: function(style, link) {
-      for (var i=0, a$=link.attributes, l=a$.length, a; (a=a$[i]) && i<l; i++) {
-        if (a.name !== 'rel' && a.name !== 'href') {
-          style.setAttribute(a.name, a.value);
-        }
-      }
-    },
-    findLoadableStyles: function(root) {
-      var loadables = [];
-      if (root) {
-        var s$ = root.querySelectorAll(STYLE_SELECTOR);
-        for (var i=0, l=s$.length, s; (i<l) && (s=s$[i]); i++) {
-          if (s.textContent.match(STYLE_LOADABLE_MATCH)) {
-            loadables.push(s);
-          }
-        }
-      }
-      return loadables;
-    },
-    /**
-     * Install external stylesheets loaded in <polymer-element> elements into the 
-     * element's template.
-     * @param elementElement The <element> element to style.
-     */
-    installSheets: function() {
-      this.cacheSheets();
-      this.cacheStyles();
-      this.installLocalSheets();
-      this.installGlobalStyles();
-    },
-    /**
-     * Remove all sheets from element and store for later use.
-     */
-    cacheSheets: function() {
-      this.sheets = this.findNodes(SHEET_SELECTOR);
-      this.sheets.forEach(function(s) {
-        if (s.parentNode) {
-          s.parentNode.removeChild(s);
-        }
-      });
-    },
-    cacheStyles: function() {
-      this.styles = this.findNodes(STYLE_SELECTOR + '[' + SCOPE_ATTR + ']');
-      this.styles.forEach(function(s) {
-        if (s.parentNode) {
-          s.parentNode.removeChild(s);
-        }
-      });
-    },
-    /**
-     * Takes external stylesheets loaded in an <element> element and moves
-     * their content into a <style> element inside the <element>'s template.
-     * The sheet is then removed from the <element>. This is done only so 
-     * that if the element is loaded in the main document, the sheet does
-     * not become active.
-     * Note, ignores sheets with the attribute 'polymer-scope'.
-     * @param elementElement The <element> element to style.
-     */
-    installLocalSheets: function () {
-      var sheets = this.sheets.filter(function(s) {
-        return !s.hasAttribute(SCOPE_ATTR);
-      });
-      var content = this.templateContent();
-      if (content) {
-        var cssText = '';
-        sheets.forEach(function(sheet) {
-          cssText += cssTextFromSheet(sheet) + '\n';
-        });
-        if (cssText) {
-          var style = createStyleElement(cssText, this.ownerDocument);
-          content.insertBefore(style, content.firstChild);
-        }
-      }
-    },
-    findNodes: function(selector, matcher) {
-      var nodes = this.querySelectorAll(selector).array();
-      var content = this.templateContent();
-      if (content) {
-        var templateNodes = content.querySelectorAll(selector).array();
-        nodes = nodes.concat(templateNodes);
-      }
-      return matcher ? nodes.filter(matcher) : nodes;
-    },
-    /**
-     * Promotes external stylesheets and <style> elements with the attribute 
-     * polymer-scope='global' into global scope.
-     * This is particularly useful for defining @keyframe rules which 
-     * currently do not function in scoped or shadow style elements.
-     * (See wkb.ug/72462)
-     * @param elementElement The <element> element to style.
-    */
-    // TODO(sorvell): remove when wkb.ug/72462 is addressed.
-    installGlobalStyles: function() {
-      var style = this.styleForScope(STYLE_GLOBAL_SCOPE);
-      applyStyleToScope(style, document.head);
-    },
-    cssTextForScope: function(scopeDescriptor) {
-      var cssText = '';
-      // handle stylesheets
-      var selector = '[' + SCOPE_ATTR + '=' + scopeDescriptor + ']';
-      var matcher = function(s) {
-        return matchesSelector(s, selector);
-      };
-      var sheets = this.sheets.filter(matcher);
-      sheets.forEach(function(sheet) {
-        cssText += cssTextFromSheet(sheet) + '\n\n';
-      });
-      // handle cached style elements
-      var styles = this.styles.filter(matcher);
-      styles.forEach(function(style) {
-        cssText += style.textContent + '\n\n';
-      });
-      return cssText;
-    },
-    styleForScope: function(scopeDescriptor) {
-      var cssText = this.cssTextForScope(scopeDescriptor);
-      return this.cssTextToScopeStyle(cssText, scopeDescriptor);
-    },
-    cssTextToScopeStyle: function(cssText, scopeDescriptor) {
-      if (cssText) {
-        var style = createStyleElement(cssText);
-        style.setAttribute(STYLE_SCOPE_ATTRIBUTE, this.getAttribute('name') +
-            '-' + scopeDescriptor);
-        return style;
-      }
-    }
-  };
-
-  function importRuleForSheet(sheet, baseUrl) {
-    var href = new URL(sheet.getAttribute('href'), baseUrl).href;
-    return '@import \'' + href + '\';';
-  }
-
-  function applyStyleToScope(style, scope) {
-    if (style) {
-      if (scope === document) {
-        scope = document.head;
-      }
-      if (hasShadowDOMPolyfill) {
-        scope = document.head;
-      }
-      // TODO(sorvell): necessary for IE
-      // see https://connect.microsoft.com/IE/feedback/details/790212/
-      // cloning-a-style-element-and-adding-to-document-produces
-      // -unexpected-result#details
-      // var clone = style.cloneNode(true);
-      var clone = createStyleElement(style.textContent);
-      var attr = style.getAttribute(STYLE_SCOPE_ATTRIBUTE);
-      if (attr) {
-        clone.setAttribute(STYLE_SCOPE_ATTRIBUTE, attr);
-      }
-      // TODO(sorvell): probably too brittle; try to figure out 
-      // where to put the element.
-      var refNode = scope.firstElementChild;
-      if (scope === document.head) {
-        var selector = 'style[' + STYLE_SCOPE_ATTRIBUTE + ']';
-        var s$ = document.head.querySelectorAll(selector);
-        if (s$.length) {
-          refNode = s$[s$.length-1].nextElementSibling;
-        }
-      }
-      scope.insertBefore(clone, refNode);
-    }
-  }
-
-  function createStyleElement(cssText, scope) {
-    scope = scope || document;
-    scope = scope.createElement ? scope : scope.ownerDocument;
-    var style = scope.createElement('style');
-    style.textContent = cssText;
-    return style;
-  }
-
-  function cssTextFromSheet(sheet) {
-    return (sheet && sheet.__resource) || '';
-  }
-
-  function matchesSelector(node, inSelector) {
-    if (matches) {
-      return matches.call(node, inSelector);
-    }
-  }
-  var p = HTMLElement.prototype;
-  var matches = p.matches || p.matchesSelector || p.webkitMatchesSelector 
-      || p.mozMatchesSelector;
-  
-  // exports
-
-  scope.api.declaration.styles = styles;
-  scope.applyStyleToScope = applyStyleToScope;
-  
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var log = window.WebComponents ? WebComponents.flags.log : {};
-  var api = scope.api.instance.events;
-  var EVENT_PREFIX = api.EVENT_PREFIX;
-
-  var mixedCaseEventTypes = {};
-  [
-    'webkitAnimationStart',
-    'webkitAnimationEnd',
-    'webkitTransitionEnd',
-    'DOMFocusOut',
-    'DOMFocusIn',
-    'DOMMouseScroll'
-  ].forEach(function(e) {
-    mixedCaseEventTypes[e.toLowerCase()] = e;
-  });
-
-  // polymer-element declarative api: events feature
-  var events = {
-    parseHostEvents: function() {
-      // our delegates map
-      var delegates = this.prototype.eventDelegates;
-      // extract data from attributes into delegates
-      this.addAttributeDelegates(delegates);
-    },
-    addAttributeDelegates: function(delegates) {
-      // for each attribute
-      for (var i=0, a; a=this.attributes[i]; i++) {
-        // does it have magic marker identifying it as an event delegate?
-        if (this.hasEventPrefix(a.name)) {
-          // if so, add the info to delegates
-          delegates[this.removeEventPrefix(a.name)] = a.value.replace('{{', '')
-              .replace('}}', '').trim();
-        }
-      }
-    },
-    // starts with 'on-'
-    hasEventPrefix: function (n) {
-      return n && (n[0] === 'o') && (n[1] === 'n') && (n[2] === '-');
-    },
-    removeEventPrefix: function(n) {
-      return n.slice(prefixLength);
-    },
-    findController: function(node) {
-      while (node.parentNode) {
-        if (node.eventController) {
-          return node.eventController;
-        }
-        node = node.parentNode;
-      }
-      return node.host;
-    },
-    getEventHandler: function(controller, target, method) {
-      var events = this;
-      return function(e) {
-        if (!controller || !controller.PolymerBase) {
-          controller = events.findController(target);
-        }
-
-        var args = [e, e.detail, e.currentTarget];
-        controller.dispatchMethod(controller, method, args);
-      };
-    },
-    prepareEventBinding: function(pathString, name, node) {
-      if (!this.hasEventPrefix(name))
-        return;
-
-      var eventType = this.removeEventPrefix(name);
-      eventType = mixedCaseEventTypes[eventType] || eventType;
-
-      var events = this;
-
-      return function(model, node, oneTime) {
-        var handler = events.getEventHandler(undefined, node, pathString);
-        PolymerGestures.addEventListener(node, eventType, handler);
-
-        if (oneTime)
-          return;
-
-        // TODO(rafaelw): This is really pointless work. Aside from the cost
-        // of these allocations, NodeBind is going to setAttribute back to its
-        // current value. Fixing this would mean changing the TemplateBinding
-        // binding delegate API.
-        function bindingValue() {
-          return '{{ ' + pathString + ' }}';
-        }
-
-        return {
-          open: bindingValue,
-          discardChanges: bindingValue,
-          close: function() {
-            PolymerGestures.removeEventListener(node, eventType, handler);
-          }
-        };
-      };
-    }
-  };
-
-  var prefixLength = EVENT_PREFIX.length;
-
-  // exports
-  scope.api.declaration.events = events;
-
-})(Polymer);
-
-(function(scope) {
-
-  // element api
-
-  var observationBlacklist = ['attribute'];
-
-  var properties = {
-    inferObservers: function(prototype) {
-      // called before prototype.observe is chained to inherited object
-      var observe = prototype.observe, property;
-      for (var n in prototype) {
-        if (n.slice(-7) === 'Changed') {
-          property = n.slice(0, -7);
-          if (this.canObserveProperty(property)) {
-            if (!observe) {
-              observe  = (prototype.observe = {});
-            }
-            observe[property] = observe[property] || n;
-          }
-        }
-      }
-    },
-    canObserveProperty: function(property) {
-      return (observationBlacklist.indexOf(property) < 0);
-    },
-    explodeObservers: function(prototype) {
-      // called before prototype.observe is chained to inherited object
-      var o = prototype.observe;
-      if (o) {
-        var exploded = {};
-        for (var n in o) {
-          var names = n.split(' ');
-          for (var i=0, ni; ni=names[i]; i++) {
-            exploded[ni] = o[n];
-          }
-        }
-        prototype.observe = exploded;
-      }
-    },
-    optimizePropertyMaps: function(prototype) {
-      if (prototype.observe) {
-        // construct name list
-        var a = prototype._observeNames = [];
-        for (var n in prototype.observe) {
-          var names = n.split(' ');
-          for (var i=0, ni; ni=names[i]; i++) {
-            a.push(ni);
-          }
-        }
-      }
-      if (prototype.publish) {
-        // construct name list
-        var a = prototype._publishNames = [];
-        for (var n in prototype.publish) {
-          a.push(n);
-        }
-      }
-      if (prototype.computed) {
-        // construct name list
-        var a = prototype._computedNames = [];
-        for (var n in prototype.computed) {
-          a.push(n);
-        }
-      }
-    },
-    publishProperties: function(prototype, base) {
-      // if we have any properties to publish
-      var publish = prototype.publish;
-      if (publish) {
-        // transcribe `publish` entries onto own prototype
-        this.requireProperties(publish, prototype, base);
-        // warn and remove accessor names that are broken on some browsers
-        this.filterInvalidAccessorNames(publish);
-        // construct map of lower-cased property names
-        prototype._publishLC = this.lowerCaseMap(publish);
-      }
-      var computed = prototype.computed;
-      if (computed) {
-        // warn and remove accessor names that are broken on some browsers
-        this.filterInvalidAccessorNames(computed);
-      }
-    },
-    // Publishing/computing a property where the name might conflict with a
-    // browser property is not currently supported to help users of Polymer
-    // avoid browser bugs:
-    //
-    // https://code.google.com/p/chromium/issues/detail?id=43394
-    // https://bugs.webkit.org/show_bug.cgi?id=49739
-    //
-    // We can lift this restriction when those bugs are fixed.
-    filterInvalidAccessorNames: function(propertyNames) {
-      for (var name in propertyNames) {
-        // Check if the name is in our blacklist.
-        if (this.propertyNameBlacklist[name]) {
-          console.warn('Cannot define property "' + name + '" for element "' +
-            this.name + '" because it has the same name as an HTMLElement ' +
-            'property, and not all browsers support overriding that. ' +
-            'Consider giving it a different name.');
-          // Remove the invalid accessor from the list.
-          delete propertyNames[name];
-        }
-      }
-    },
-    //
-    // `name: value` entries in the `publish` object may need to generate 
-    // matching properties on the prototype.
-    //
-    // Values that are objects may have a `reflect` property, which
-    // signals that the value describes property control metadata.
-    // In metadata objects, the prototype default value (if any)
-    // is encoded in the `value` property.
-    //
-    // publish: {
-    //   foo: 5, 
-    //   bar: {value: true, reflect: true},
-    //   zot: {}
-    // }
-    //
-    // `reflect` metadata property controls whether changes to the property
-    // are reflected back to the attribute (default false). 
-    //
-    // A value is stored on the prototype unless it's === `undefined`,
-    // in which case the base chain is checked for a value.
-    // If the basal value is also undefined, `null` is stored on the prototype.
-    //
-    // The reflection data is stored on another prototype object, `reflect`
-    // which also can be specified directly.
-    //
-    // reflect: {
-    //   foo: true
-    // }
-    //
-    requireProperties: function(propertyInfos, prototype, base) {
-      // per-prototype storage for reflected properties
-      prototype.reflect = prototype.reflect || {};
-      // ensure a prototype value for each property
-      // and update the property's reflect to attribute status
-      for (var n in propertyInfos) {
-        var value = propertyInfos[n];
-        // value has metadata if it has a `reflect` property
-        if (value && value.reflect !== undefined) {
-          prototype.reflect[n] = Boolean(value.reflect);
-          value = value.value;
-        }
-        // only set a value if one is specified
-        if (value !== undefined) {
-          prototype[n] = value;
-        }
-      }
-    },
-    lowerCaseMap: function(properties) {
-      var map = {};
-      for (var n in properties) {
-        map[n.toLowerCase()] = n;
-      }
-      return map;
-    },
-    createPropertyAccessor: function(name, ignoreWrites) {
-      var proto = this.prototype;
-
-      var privateName = name + '_';
-      var privateObservable  = name + 'Observable_';
-      proto[privateName] = proto[name];
-
-      Object.defineProperty(proto, name, {
-        get: function() {
-          var observable = this[privateObservable];
-          if (observable)
-            observable.deliver();
-
-          return this[privateName];
-        },
-        set: function(value) {
-          if (ignoreWrites) {
-            return this[privateName];
-          }
-
-          var observable = this[privateObservable];
-          if (observable) {
-            observable.setValue(value);
-            return;
-          }
-
-          var oldValue = this[privateName];
-          this[privateName] = value;
-          this.emitPropertyChangeRecord(name, value, oldValue);
-
-          return value;
-        },
-        configurable: true
-      });
-    },
-    createPropertyAccessors: function(prototype) {
-      var n$ = prototype._computedNames;
-      if (n$ && n$.length) {
-        for (var i=0, l=n$.length, n, fn; (i<l) && (n=n$[i]); i++) {
-          this.createPropertyAccessor(n, true);
-        }
-      }
-      var n$ = prototype._publishNames;
-      if (n$ && n$.length) {
-        for (var i=0, l=n$.length, n, fn; (i<l) && (n=n$[i]); i++) {
-          // If the property is computed and published, the accessor is created
-          // above.
-          if (!prototype.computed || !prototype.computed[n]) {
-            this.createPropertyAccessor(n);
-          }
-        }
-      }
-    },
-    // This list contains some property names that people commonly want to use,
-    // but won't work because of Chrome/Safari bugs. It isn't an exhaustive
-    // list. In particular it doesn't contain any property names found on
-    // subtypes of HTMLElement (e.g. name, value). Rather it attempts to catch
-    // some common cases.
-    propertyNameBlacklist: {
-      children: 1,
-      'class': 1,
-      id: 1,
-      hidden: 1,
-      style: 1,
-      title: 1,
-    }
-  };
-
-  // exports
-
-  scope.api.declaration.properties = properties;
-
-})(Polymer);
-
-(function(scope) {
-
-  // magic words
-
-  var ATTRIBUTES_ATTRIBUTE = 'attributes';
-  var ATTRIBUTES_REGEX = /\s|,/;
-
-  // attributes api
-
-  var attributes = {
-    
-    inheritAttributesObjects: function(prototype) {
-      // chain our lower-cased publish map to the inherited version
-      this.inheritObject(prototype, 'publishLC');
-      // chain our instance attributes map to the inherited version
-      this.inheritObject(prototype, '_instanceAttributes');
-    },
-
-    publishAttributes: function(prototype, base) {
-      // merge names from 'attributes' attribute into the 'publish' object
-      var attributes = this.getAttribute(ATTRIBUTES_ATTRIBUTE);
-      if (attributes) {
-        // create a `publish` object if needed.
-        // the `publish` object is only relevant to this prototype, the 
-        // publishing logic in `declaration/properties.js` is responsible for
-        // managing property values on the prototype chain.
-        // TODO(sjmiles): the `publish` object is later chained to it's 
-        //                ancestor object, presumably this is only for 
-        //                reflection or other non-library uses. 
-        var publish = prototype.publish || (prototype.publish = {}); 
-        // names='a b c' or names='a,b,c'
-        var names = attributes.split(ATTRIBUTES_REGEX);
-        // record each name for publishing
-        for (var i=0, l=names.length, n; i<l; i++) {
-          // remove excess ws
-          n = names[i].trim();
-          // looks weird, but causes n to exist on `publish` if it does not;
-          // a more careful test would need expensive `in` operator
-          if (n && publish[n] === undefined) {
-            publish[n] = undefined;
-          }
-        }
-      }
-    },
-
-    // record clonable attributes from <element>
-    accumulateInstanceAttributes: function() {
-      // inherit instance attributes
-      var clonable = this.prototype._instanceAttributes;
-      // merge attributes from element
-      var a$ = this.attributes;
-      for (var i=0, l=a$.length, a; (i<l) && (a=a$[i]); i++) {  
-        if (this.isInstanceAttribute(a.name)) {
-          clonable[a.name] = a.value;
-        }
-      }
-    },
-
-    isInstanceAttribute: function(name) {
-      return !this.blackList[name] && name.slice(0,3) !== 'on-';
-    },
-
-    // do not clone these attributes onto instances
-    blackList: {
-      name: 1,
-      'extends': 1,
-      constructor: 1,
-      noscript: 1,
-      assetpath: 1,
-      'cache-csstext': 1
-    }
-    
-  };
-
-  // add ATTRIBUTES_ATTRIBUTE to the blacklist
-  attributes.blackList[ATTRIBUTES_ATTRIBUTE] = 1;
-
-  // exports
-
-  scope.api.declaration.attributes = attributes;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-  var events = scope.api.declaration.events;
-
-  var syntax = new PolymerExpressions();
-  var prepareBinding = syntax.prepareBinding;
-
-  // Polymer takes a first crack at the binding to see if it's a declarative
-  // event handler.
-  syntax.prepareBinding = function(pathString, name, node) {
-    return events.prepareEventBinding(pathString, name, node) ||
-           prepareBinding.call(syntax, pathString, name, node);
-  };
-
-  // declaration api supporting mdv
-  var mdv = {
-    syntax: syntax,
-    fetchTemplate: function() {
-      return this.querySelector('template');
-    },
-    templateContent: function() {
-      var template = this.fetchTemplate();
-      return template && template.content;
-    },
-    installBindingDelegate: function(template) {
-      if (template) {
-        template.bindingDelegate = this.syntax;
-      }
-    }
-  };
-
-  // exports
-  scope.api.declaration.mdv = mdv;
-
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-  
-  var api = scope.api;
-  var isBase = scope.isBase;
-  var extend = scope.extend;
-
-  var hasShadowDOMPolyfill = window.ShadowDOMPolyfill;
-
-  // prototype api
-
-  var prototype = {
-
-    register: function(name, extendeeName) {
-      // build prototype combining extendee, Polymer base, and named api
-      this.buildPrototype(name, extendeeName);
-      // register our custom element with the platform
-      this.registerPrototype(name, extendeeName);
-      // reference constructor in a global named by 'constructor' attribute
-      this.publishConstructor();
-    },
-
-    buildPrototype: function(name, extendeeName) {
-      // get our custom prototype (before chaining)
-      var extension = scope.getRegisteredPrototype(name);
-      // get basal prototype
-      var base = this.generateBasePrototype(extendeeName);
-      // implement declarative features
-      this.desugarBeforeChaining(extension, base);
-      // join prototypes
-      this.prototype = this.chainPrototypes(extension, base);
-      // more declarative features
-      this.desugarAfterChaining(name, extendeeName);
-    },
-
-    desugarBeforeChaining: function(prototype, base) {
-      // back reference declaration element
-      // TODO(sjmiles): replace `element` with `elementElement` or `declaration`
-      prototype.element = this;
-      // transcribe `attributes` declarations onto own prototype's `publish`
-      this.publishAttributes(prototype, base);
-      // `publish` properties to the prototype and to attribute watch
-      this.publishProperties(prototype, base);
-      // infer observers for `observe` list based on method names
-      this.inferObservers(prototype);
-      // desugar compound observer syntax, e.g. 'a b c' 
-      this.explodeObservers(prototype);
-    },
-
-    chainPrototypes: function(prototype, base) {
-      // chain various meta-data objects to inherited versions
-      this.inheritMetaData(prototype, base);
-      // chain custom api to inherited
-      var chained = this.chainObject(prototype, base);
-      // x-platform fixup
-      ensurePrototypeTraversal(chained);
-      return chained;
-    },
-
-    inheritMetaData: function(prototype, base) {
-      // chain observe object to inherited
-      this.inheritObject('observe', prototype, base);
-      // chain publish object to inherited
-      this.inheritObject('publish', prototype, base);
-      // chain reflect object to inherited
-      this.inheritObject('reflect', prototype, base);
-      // chain our lower-cased publish map to the inherited version
-      this.inheritObject('_publishLC', prototype, base);
-      // chain our instance attributes map to the inherited version
-      this.inheritObject('_instanceAttributes', prototype, base);
-      // chain our event delegates map to the inherited version
-      this.inheritObject('eventDelegates', prototype, base);
-    },
-
-    // implement various declarative features
-    desugarAfterChaining: function(name, extendee) {
-      // build side-chained lists to optimize iterations
-      this.optimizePropertyMaps(this.prototype);
-      this.createPropertyAccessors(this.prototype);
-      // install mdv delegate on template
-      this.installBindingDelegate(this.fetchTemplate());
-      // install external stylesheets as if they are inline
-      this.installSheets();
-      // adjust any paths in dom from imports
-      this.resolveElementPaths(this);
-      // compile list of attributes to copy to instances
-      this.accumulateInstanceAttributes();
-      // parse on-* delegates declared on `this` element
-      this.parseHostEvents();
-      //
-      // install a helper method this.resolvePath to aid in 
-      // setting resource urls. e.g.
-      // this.$.image.src = this.resolvePath('images/foo.png')
-      this.addResolvePathApi();
-      // under ShadowDOMPolyfill, transforms to approximate missing CSS features
-      if (hasShadowDOMPolyfill) {
-        WebComponents.ShadowCSS.shimStyling(this.templateContent(), name,
-          extendee);
-      }
-      // allow custom element access to the declarative context
-      if (this.prototype.registerCallback) {
-        this.prototype.registerCallback(this);
-      }
-    },
-
-    // if a named constructor is requested in element, map a reference
-    // to the constructor to the given symbol
-    publishConstructor: function() {
-      var symbol = this.getAttribute('constructor');
-      if (symbol) {
-        window[symbol] = this.ctor;
-      }
-    },
-
-    // build prototype combining extendee, Polymer base, and named api
-    generateBasePrototype: function(extnds) {
-      var prototype = this.findBasePrototype(extnds);
-      if (!prototype) {
-        // create a prototype based on tag-name extension
-        var prototype = HTMLElement.getPrototypeForTag(extnds);
-        // insert base api in inheritance chain (if needed)
-        prototype = this.ensureBaseApi(prototype);
-        // memoize this base
-        memoizedBases[extnds] = prototype;
-      }
-      return prototype;
-    },
-
-    findBasePrototype: function(name) {
-      return memoizedBases[name];
-    },
-
-    // install Polymer instance api into prototype chain, as needed 
-    ensureBaseApi: function(prototype) {
-      if (prototype.PolymerBase) {
-        return prototype;
-      }
-      var extended = Object.create(prototype);
-      // we need a unique copy of base api for each base prototype
-      // therefore we 'extend' here instead of simply chaining
-      api.publish(api.instance, extended);
-      // TODO(sjmiles): sharing methods across prototype chains is
-      // not supported by 'super' implementation which optimizes
-      // by memoizing prototype relationships.
-      // Probably we should have a version of 'extend' that is 
-      // share-aware: it could study the text of each function,
-      // look for usage of 'super', and wrap those functions in
-      // closures.
-      // As of now, there is only one problematic method, so 
-      // we just patch it manually.
-      // To avoid re-entrancy problems, the special super method
-      // installed is called `mixinSuper` and the mixin method
-      // must use this method instead of the default `super`.
-      this.mixinMethod(extended, prototype, api.instance.mdv, 'bind');
-      // return buffed-up prototype
-      return extended;
-    },
-
-    mixinMethod: function(extended, prototype, api, name) {
-      var $super = function(args) {
-        return prototype[name].apply(this, args);
-      };
-      extended[name] = function() {
-        this.mixinSuper = $super;
-        return api[name].apply(this, arguments);
-      }
-    },
-
-    // ensure prototype[name] inherits from a prototype.prototype[name]
-    inheritObject: function(name, prototype, base) {
-      // require an object
-      var source = prototype[name] || {};
-      // chain inherited properties onto a new object
-      prototype[name] = this.chainObject(source, base[name]);
-    },
-
-    // register 'prototype' to custom element 'name', store constructor 
-    registerPrototype: function(name, extendee) { 
-      var info = {
-        prototype: this.prototype
-      }
-      // native element must be specified in extends
-      var typeExtension = this.findTypeExtension(extendee);
-      if (typeExtension) {
-        info.extends = typeExtension;
-      }
-      // register the prototype with HTMLElement for name lookup
-      HTMLElement.register(name, this.prototype);
-      // register the custom type
-      this.ctor = document.registerElement(name, info);
-    },
-
-    findTypeExtension: function(name) {
-      if (name && name.indexOf('-') < 0) {
-        return name;
-      } else {
-        var p = this.findBasePrototype(name);
-        if (p.element) {
-          return this.findTypeExtension(p.element.extends);
-        }
-      }
-    }
-
-  };
-
-  // memoize base prototypes
-  var memoizedBases = {};
-
-  // implementation of 'chainObject' depends on support for __proto__
-  if (Object.__proto__) {
-    prototype.chainObject = function(object, inherited) {
-      if (object && inherited && object !== inherited) {
-        object.__proto__ = inherited;
-      }
-      return object;
-    }
-  } else {
-    prototype.chainObject = function(object, inherited) {
-      if (object && inherited && object !== inherited) {
-        var chained = Object.create(inherited);
-        object = extend(chained, object);
-      }
-      return object;
-    }
-  }
-
-  // On platforms that do not support __proto__ (versions of IE), the prototype
-  // chain of a custom element is simulated via installation of __proto__.
-  // Although custom elements manages this, we install it here so it's
-  // available during desugaring.
-  function ensurePrototypeTraversal(prototype) {
-    if (!Object.__proto__) {
-      var ancestor = Object.getPrototypeOf(prototype);
-      prototype.__proto__ = ancestor;
-      if (isBase(ancestor)) {
-        ancestor.__proto__ = Object.getPrototypeOf(ancestor);
-      }
-    }
-  }
-
-  // exports
-
-  api.declaration.prototype = prototype;
-
-})(Polymer);
-
-(function(scope) {
-
-  /*
-
-    Elements are added to a registration queue so that they register in 
-    the proper order at the appropriate time. We do this for a few reasons:
-
-    * to enable elements to load resources (like stylesheets) 
-    asynchronously. We need to do this until the platform provides an efficient
-    alternative. One issue is that remote @import stylesheets are 
-    re-fetched whenever stamped into a shadowRoot.
-
-    * to ensure elements loaded 'at the same time' (e.g. via some set of
-    imports) are registered as a batch. This allows elements to be enured from
-    upgrade ordering as long as they query the dom tree 1 task after
-    upgrade (aka domReady). This is a performance tradeoff. On the one hand,
-    elements that could register while imports are loading are prevented from 
-    doing so. On the other, grouping upgrades into a single task means less
-    incremental work (for example style recalcs),  Also, we can ensure the 
-    document is in a known state at the single quantum of time when 
-    elements upgrade.
-
-  */
-  var queue = {
-
-    // tell the queue to wait for an element to be ready
-    wait: function(element) {
-      if (!element.__queue) {
-        element.__queue = {};
-        elements.push(element);
-      }
-    },
-
-    // enqueue an element to the next spot in the queue.
-    enqueue: function(element, check, go) {
-      var shouldAdd = element.__queue && !element.__queue.check;
-      if (shouldAdd) {
-        queueForElement(element).push(element);
-        element.__queue.check = check;
-        element.__queue.go = go;
-      }
-      return (this.indexOf(element) !== 0);
-    },
-
-    indexOf: function(element) {
-      var i = queueForElement(element).indexOf(element);
-      if (i >= 0 && document.contains(element)) {
-        i += (HTMLImports.useNative || HTMLImports.ready) ? 
-          importQueue.length : 1e9;
-      }
-      return i;  
-    },
-
-    // tell the queue an element is ready to be registered
-    go: function(element) {
-      var readied = this.remove(element);
-      if (readied) {
-        element.__queue.flushable = true;
-        this.addToFlushQueue(readied);
-        this.check();
-      }
-    },
-
-    remove: function(element) {
-      var i = this.indexOf(element);
-      if (i !== 0) {
-        //console.warn('queue order wrong', i);
-        return;
-      }
-      return queueForElement(element).shift();
-    },
-
-    check: function() {
-      // next
-      var element = this.nextElement();
-      if (element) {
-        element.__queue.check.call(element);
-      }
-      if (this.canReady()) {
-        this.ready();
-        return true;
-      }
-    },
-
-    nextElement: function() {
-      return nextQueued();
-    },
-
-    canReady: function() {
-      return !this.waitToReady && this.isEmpty();
-    },
-
-    isEmpty: function() {
-      for (var i=0, l=elements.length, e; (i<l) && 
-          (e=elements[i]); i++) {
-        if (e.__queue && !e.__queue.flushable) {
-          return;
-        }
-      }
-      return true;
-    },
-
-    addToFlushQueue: function(element) {
-      flushQueue.push(element);  
-    },
-
-    flush: function() {
-      // prevent re-entrance
-      if (this.flushing) {
-        return;
-      }
-      this.flushing = true;
-      var element;
-      while (flushQueue.length) {
-        element = flushQueue.shift();
-        element.__queue.go.call(element);
-        element.__queue = null;
-      }
-      this.flushing = false;
-    },
-
-    ready: function() {
-      // TODO(sorvell): As an optimization, turn off CE polyfill upgrading
-      // while registering. This way we avoid having to upgrade each document
-      // piecemeal per registration and can instead register all elements
-      // and upgrade once in a batch. Without this optimization, upgrade time
-      // degrades significantly when SD polyfill is used. This is mainly because
-      // querying the document tree for elements is slow under the SD polyfill.
-      var polyfillWasReady = CustomElements.ready;
-      CustomElements.ready = false;
-      this.flush();
-      if (!CustomElements.useNative) {
-        CustomElements.upgradeDocumentTree(document);
-      }
-      CustomElements.ready = polyfillWasReady;
-      Polymer.flush();
-      requestAnimationFrame(this.flushReadyCallbacks);
-    },
-
-    addReadyCallback: function(callback) {
-      if (callback) {
-        readyCallbacks.push(callback);
-      }
-    },
-
-    flushReadyCallbacks: function() {
-      if (readyCallbacks) {
-        var fn;
-        while (readyCallbacks.length) {
-          fn = readyCallbacks.shift();
-          fn();
-        }
-      }
-    },
-  
-    /**
-    Returns a list of elements that have had polymer-elements created but 
-    are not yet ready to register. The list is an array of element definitions.
-    */
-    waitingFor: function() {
-      var e$ = [];
-      for (var i=0, l=elements.length, e; (i<l) && 
-          (e=elements[i]); i++) {
-        if (e.__queue && !e.__queue.flushable) {
-          e$.push(e);
-        }
-      }
-      return e$;
-    },
-
-    waitToReady: true
-
-  };
-
-  var elements = [];
-  var flushQueue = [];
-  var importQueue = [];
-  var mainQueue = [];
-  var readyCallbacks = [];
-
-  function queueForElement(element) {
-    return document.contains(element) ? mainQueue : importQueue;
-  }
-
-  function nextQueued() {
-    return importQueue.length ? importQueue[0] : mainQueue[0];
-  }
-
-  function whenReady(callback) {
-    queue.waitToReady = true;
-    Polymer.endOfMicrotask(function() {
-      HTMLImports.whenReady(function() {
-        queue.addReadyCallback(callback);
-        queue.waitToReady = false;
-        queue.check();
-    });
-    });
-  }
-
-  /**
-    Forces polymer to register any pending elements. Can be used to abort
-    waiting for elements that are partially defined.
-    @param timeout {Integer} Optional timeout in milliseconds
-  */
-  function forceReady(timeout) {
-    if (timeout === undefined) {
-      queue.ready();
-      return;
-    }
-    var handle = setTimeout(function() {
-      queue.ready();
-    }, timeout);
-    Polymer.whenReady(function() {
-      clearTimeout(handle);
-    });
-  }
-
-  // exports
-  scope.elements = elements;
-  scope.waitingFor = queue.waitingFor.bind(queue);
-  scope.forceReady = forceReady;
-  scope.queue = queue;
-  scope.whenReady = scope.whenPolymerReady = whenReady;
-})(Polymer);
-
-(function(scope) {
-
-  // imports
-
-  var extend = scope.extend;
-  var api = scope.api;
-  var queue = scope.queue;
-  var whenReady = scope.whenReady;
-  var getRegisteredPrototype = scope.getRegisteredPrototype;
-  var waitingForPrototype = scope.waitingForPrototype;
-
-  // declarative implementation: <polymer-element>
-
-  var prototype = extend(Object.create(HTMLElement.prototype), {
-
-    createdCallback: function() {
-      if (this.getAttribute('name')) {
-        this.init();
-      }
-    },
-
-    init: function() {
-      // fetch declared values
-      this.name = this.getAttribute('name');
-      this.extends = this.getAttribute('extends');
-      queue.wait(this);
-      // initiate any async resource fetches
-      this.loadResources();
-      // register when all constraints are met
-      this.registerWhenReady();
-    },
-
-    // TODO(sorvell): we currently queue in the order the prototypes are 
-    // registered, but we should queue in the order that polymer-elements
-    // are registered. We are currently blocked from doing this based on 
-    // crbug.com/395686.
-    registerWhenReady: function() {
-     if (this.registered
-       || this.waitingForPrototype(this.name)
-       || this.waitingForQueue()
-       || this.waitingForResources()) {
-          return;
-      }
-      queue.go(this);
-    },
-
-    _register: function() {
-      //console.log('registering', this.name);
-      // warn if extending from a custom element not registered via Polymer
-      if (isCustomTag(this.extends) && !isRegistered(this.extends)) {
-        console.warn('%s is attempting to extend %s, an unregistered element ' +
-            'or one that was not registered with Polymer.', this.name,
-            this.extends);
-      }
-      this.register(this.name, this.extends);
-      this.registered = true;
-    },
-
-    waitingForPrototype: function(name) {
-      if (!getRegisteredPrototype(name)) {
-        // then wait for a prototype
-        waitingForPrototype(name, this);
-        // emulate script if user is not supplying one
-        this.handleNoScript(name);
-        // prototype not ready yet
-        return true;
-      }
-    },
-
-    handleNoScript: function(name) {
-      // if explicitly marked as 'noscript'
-      if (this.hasAttribute('noscript') && !this.noscript) {
-        this.noscript = true;
-        // imperative element registration
-        Polymer(name);
-      }
-    },
-
-    waitingForResources: function() {
-      return this._needsResources;
-    },
-
-    // NOTE: Elements must be queued in proper order for inheritance/composition
-    // dependency resolution. Previously this was enforced for inheritance,
-    // and by rule for composition. It's now entirely by rule.
-    waitingForQueue: function() {
-      return queue.enqueue(this, this.registerWhenReady, this._register);
-    },
-
-    loadResources: function() {
-      this._needsResources = true;
-      this.loadStyles(function() {
-        this._needsResources = false;
-        this.registerWhenReady();
-      }.bind(this));
-    }
-
-  });
-
-  // semi-pluggable APIs 
-
-  // TODO(sjmiles): should be fully pluggable (aka decoupled, currently
-  // the various plugins are allowed to depend on each other directly)
-  api.publish(api.declaration, prototype);
-
-  // utility and bookkeeping
-
-  function isRegistered(name) {
-    return Boolean(HTMLElement.getPrototypeForTag(name));
-  }
-
-  function isCustomTag(name) {
-    return (name && name.indexOf('-') >= 0);
-  }
-
-  // boot tasks
-
-  whenReady(function() {
-    document.body.removeAttribute('unresolved');
-    document.dispatchEvent(
-      new CustomEvent('polymer-ready', {bubbles: true})
-    );
-  });
-
-  // register polymer-element with document
-
-  document.registerElement('polymer-element', {prototype: prototype});
-
-})(Polymer);
-
-(function(scope) {
-
-/**
- * @class Polymer
- */
-
-var whenReady = scope.whenReady;
-
-/**
- * Loads the set of HTMLImports contained in `node`. Notifies when all
- * the imports have loaded by calling the `callback` function argument.
- * This method can be used to lazily load imports. For example, given a 
- * template:
- *     
- *     <template>
- *       <link rel="import" href="my-import1.html">
- *       <link rel="import" href="my-import2.html">
- *     </template>
- *
- *     Polymer.importElements(template.content, function() {
- *       console.log('imports lazily loaded'); 
- *     });
- * 
- * @method importElements
- * @param {Node} node Node containing the HTMLImports to load.
- * @param {Function} callback Callback called when all imports have loaded.
- */
-function importElements(node, callback) {
-  if (node) {
-    document.head.appendChild(node);
-    whenReady(callback);
-  } else if (callback) {
-    callback();
-  }
-}
-
-/**
- * Loads an HTMLImport for each url specified in the `urls` array.
- * Notifies when all the imports have loaded by calling the `callback` 
- * function argument. This method can be used to lazily load imports. 
- * For example,
- *
- *     Polymer.import(['my-import1.html', 'my-import2.html'], function() {
- *       console.log('imports lazily loaded'); 
- *     });
- * 
- * @method import
- * @param {Array} urls Array of urls to load as HTMLImports.
- * @param {Function} callback Callback called when all imports have loaded.
- */
-function _import(urls, callback) {
-  if (urls && urls.length) {
-      var frag = document.createDocumentFragment();
-      for (var i=0, l=urls.length, url, link; (i<l) && (url=urls[i]); i++) {
-        link = document.createElement('link');
-        link.rel = 'import';
-        link.href = url;
-        frag.appendChild(link);
-      }
-      importElements(frag, callback);
-  } else if (callback) {
-    callback();
-  }
-}
-
-// exports
-scope.import = _import;
-scope.importElements = importElements;
-
-})(Polymer);
-
-/**
- * The `auto-binding` element extends the template element. It provides a quick 
- * and easy way to do data binding without the need to setup a model. 
- * The `auto-binding` element itself serves as the model and controller for the 
- * elements it contains. Both data and event handlers can be bound. 
- *
- * The `auto-binding` element acts just like a template that is bound to 
- * a model. It stamps its content in the dom adjacent to itself. When the 
- * content is stamped, the `template-bound` event is fired.
- *
- * Example:
- *
- *     <template is="auto-binding">
- *       <div>Say something: <input value="{{value}}"></div>
- *       <div>You said: {{value}}</div>
- *       <button on-tap="{{buttonTap}}">Tap me!</button>
- *     </template>
- *     <script>
- *       var template = document.querySelector('template');
- *       template.value = 'something';
- *       template.buttonTap = function() {
- *         console.log('tap!');
- *       };
- *     </script>
- *
- * @module Polymer
- * @status stable
-*/
-
-(function() {
-
-  var element = document.createElement('polymer-element');
-  element.setAttribute('name', 'auto-binding');
-  element.setAttribute('extends', 'template');
-  element.init();
-
-  Polymer('auto-binding', {
-
-    createdCallback: function() {
-      this.syntax = this.bindingDelegate = this.makeSyntax();
-      // delay stamping until polymer-ready so that auto-binding is not
-      // required to load last.
-      Polymer.whenPolymerReady(function() {
-        this.model = this;
-        this.setAttribute('bind', '');
-        // we don't bother with an explicit signal here, we could ust a MO
-        // if necessary
-        this.async(function() {
-          // note: this will marshall *all* the elements in the parentNode
-          // rather than just stamped ones. We'd need to use createInstance
-          // to fix this or something else fancier.
-          this.marshalNodeReferences(this.parentNode);
-          // template stamping is asynchronous so stamping isn't complete
-          // by polymer-ready; fire an event so users can use stamped elements
-          this.fire('template-bound');
-        });
-      }.bind(this));
-    },
-
-    makeSyntax: function() {
-      var events = Object.create(Polymer.api.declaration.events);
-      var self = this;
-      events.findController = function() { return self.model; };
-
-      var syntax = new PolymerExpressions();
-      var prepareBinding = syntax.prepareBinding;  
-      syntax.prepareBinding = function(pathString, name, node) {
-        return events.prepareEventBinding(pathString, name, node) ||
-               prepareBinding.call(syntax, pathString, name, node);
-      };
-      return syntax;
-    }
-
-  });
-
-})();