[third_party] add polymer 1.2.3

polymer_1.2.3/bower_components/webcomponentsjs/webcomponents.js

Index: polymer_1.2.3/bower_components/webcomponentsjs/webcomponents.js
diff --git a/polymer_1.0.4/bower_components/webcomponentsjs/webcomponents.js b/polymer_1.2.3/bower_components/webcomponentsjs/webcomponents.js
similarity index 96%
copy from polymer_1.0.4/bower_components/webcomponentsjs/webcomponents.js
copy to polymer_1.2.3/bower_components/webcomponentsjs/webcomponents.js
index 6d7154174e8cc313120fbf1edb33593e1688c775..546067f1851b02301672d3c11f1c4465577e1939 100644
--- a/polymer_1.0.4/bower_components/webcomponentsjs/webcomponents.js
+++ b/polymer_1.2.3/bower_components/webcomponentsjs/webcomponents.js
@@ -7,13 +7,14 @@
  * 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 0.7.5
-window.WebComponents = window.WebComponents || {};
-
-(function(scope) {
-  var flags = scope.flags || {};
+// @version 0.7.20
+(function() {
+  window.WebComponents = window.WebComponents || {
+    flags: {}
+  };
   var file = "webcomponents.js";
   var script = document.querySelector('script[src*="' + file + '"]');
+  var flags = {};
   if (!flags.noOpts) {
     location.search.slice(1).split("&").forEach(function(option) {
       var parts = option.split("=");
@@ -51,8 +52,8 @@ window.WebComponents = window.WebComponents || {};
     };
     window.CustomElements.flags.register = flags.register;
   }
-  scope.flags = flags;
-})(WebComponents);
+  WebComponents.flags = flags;
+})();
 
 if (WebComponents.flags.shadow) {
   if (typeof WeakMap === "undefined") {
@@ -351,6 +352,7 @@ if (WebComponents.flags.shadow) {
         });
       });
     }
+    scope.addForwardingProperties = addForwardingProperties;
     scope.assert = assert;
     scope.constructorTable = constructorTable;
     scope.defineGetter = defineGetter;
@@ -1158,6 +1160,24 @@ if (WebComponents.flags.shadow) {
         stopImmediatePropagationTable.set(this, true);
       }
     };
+    var supportsDefaultPrevented = function() {
+      var e = document.createEvent("Event");
+      e.initEvent("test", true, true);
+      e.preventDefault();
+      return e.defaultPrevented;
+    }();
+    if (!supportsDefaultPrevented) {
+      Event.prototype.preventDefault = function() {
+        if (!this.cancelable) return;
+        unsafeUnwrap(this).preventDefault();
+        Object.defineProperty(this, "defaultPrevented", {
+          get: function() {
+            return true;
+          },
+          configurable: true
+        });
+      };
+    }
     registerWrapper(OriginalEvent, Event, document.createEvent("Event"));
     function unwrapOptions(options) {
       if (!options || !options.relatedTarget) return options;
@@ -1781,8 +1801,8 @@ if (WebComponents.flags.shadow) {
     var originalInsertBefore = OriginalNode.prototype.insertBefore;
     var originalRemoveChild = OriginalNode.prototype.removeChild;
     var originalReplaceChild = OriginalNode.prototype.replaceChild;
-    var isIe = /Trident|Edge/.test(navigator.userAgent);
-    var removeChildOriginalHelper = isIe ? function(parent, child) {
+    var isIEOrEdge = /Trident|Edge/.test(navigator.userAgent);
+    var removeChildOriginalHelper = isIEOrEdge ? function(parent, child) {
       try {
         originalRemoveChild.call(parent, child);
       } catch (ex) {
@@ -2752,7 +2772,7 @@ if (WebComponents.flags.shadow) {
         enumerable: true
       });
     }
-    [ "getBoundingClientRect", "getClientRects", "scrollIntoView" ].forEach(methodRequiresRendering);
+    [ "focus", "getBoundingClientRect", "getClientRects", "scrollIntoView" ].forEach(methodRequiresRendering);
     registerWrapper(OriginalHTMLElement, HTMLElement, document.createElement("b"));
     scope.wrappers.HTMLElement = HTMLElement;
     scope.getInnerHTML = getInnerHTML;
@@ -3159,18 +3179,29 @@ if (WebComponents.flags.shadow) {
     "use strict";
     var Element = scope.wrappers.Element;
     var HTMLElement = scope.wrappers.HTMLElement;
-    var registerObject = scope.registerObject;
+    var registerWrapper = scope.registerWrapper;
     var defineWrapGetter = scope.defineWrapGetter;
+    var unsafeUnwrap = scope.unsafeUnwrap;
+    var wrap = scope.wrap;
+    var mixin = scope.mixin;
     var SVG_NS = "http://www.w3.org/2000/svg";
+    var OriginalSVGElement = window.SVGElement;
     var svgTitleElement = document.createElementNS(SVG_NS, "title");
-    var SVGTitleElement = registerObject(svgTitleElement);
-    var SVGElement = Object.getPrototypeOf(SVGTitleElement.prototype).constructor;
     if (!("classList" in svgTitleElement)) {
       var descr = Object.getOwnPropertyDescriptor(Element.prototype, "classList");
       Object.defineProperty(HTMLElement.prototype, "classList", descr);
       delete Element.prototype.classList;
     }
-    defineWrapGetter(SVGElement, "ownerSVGElement");
+    function SVGElement(node) {
+      Element.call(this, node);
+    }
+    SVGElement.prototype = Object.create(Element.prototype);
+    mixin(SVGElement.prototype, {
+      get ownerSVGElement() {
+        return wrap(unsafeUnwrap(this).ownerSVGElement);
+      }
+    });
+    registerWrapper(OriginalSVGElement, SVGElement, document.createElementNS(SVG_NS, "title"));
     scope.wrappers.SVGElement = SVGElement;
   })(window.ShadowDOMPolyfill);
   (function(scope) {
@@ -3276,6 +3307,7 @@ if (WebComponents.flags.shadow) {
   })(window.ShadowDOMPolyfill);
   (function(scope) {
     "use strict";
+    var addForwardingProperties = scope.addForwardingProperties;
     var mixin = scope.mixin;
     var registerWrapper = scope.registerWrapper;
     var setWrapper = scope.setWrapper;
@@ -3300,6 +3332,10 @@ if (WebComponents.flags.shadow) {
         unsafeUnwrap(this).texSubImage2D.apply(unsafeUnwrap(this), arguments);
       }
     });
+    var OriginalWebGLRenderingContextBase = Object.getPrototypeOf(OriginalWebGLRenderingContext.prototype);
+    if (OriginalWebGLRenderingContextBase !== Object.prototype) {
+      addForwardingProperties(OriginalWebGLRenderingContextBase, WebGLRenderingContext.prototype);
+    }
     var instanceProperties = /WebKit/.test(navigator.userAgent) ? {
       drawingBufferHeight: null,
       drawingBufferWidth: null
@@ -3309,20 +3345,27 @@ if (WebComponents.flags.shadow) {
   })(window.ShadowDOMPolyfill);
   (function(scope) {
     "use strict";
+    var Node = scope.wrappers.Node;
     var GetElementsByInterface = scope.GetElementsByInterface;
     var NonElementParentNodeInterface = scope.NonElementParentNodeInterface;
     var ParentNodeInterface = scope.ParentNodeInterface;
     var SelectorsInterface = scope.SelectorsInterface;
     var mixin = scope.mixin;
     var registerObject = scope.registerObject;
-    var DocumentFragment = registerObject(document.createDocumentFragment());
+    var registerWrapper = scope.registerWrapper;
+    var OriginalDocumentFragment = window.DocumentFragment;
+    function DocumentFragment(node) {
+      Node.call(this, node);
+    }
+    DocumentFragment.prototype = Object.create(Node.prototype);
     mixin(DocumentFragment.prototype, ParentNodeInterface);
     mixin(DocumentFragment.prototype, SelectorsInterface);
     mixin(DocumentFragment.prototype, GetElementsByInterface);
     mixin(DocumentFragment.prototype, NonElementParentNodeInterface);
+    registerWrapper(OriginalDocumentFragment, DocumentFragment, document.createDocumentFragment());
+    scope.wrappers.DocumentFragment = DocumentFragment;
     var Comment = registerObject(document.createComment(""));
     scope.wrappers.Comment = Comment;
-    scope.wrappers.DocumentFragment = DocumentFragment;
   })(window.ShadowDOMPolyfill);
   (function(scope) {
     "use strict";
@@ -3336,6 +3379,7 @@ if (WebComponents.flags.shadow) {
     var setInnerHTML = scope.setInnerHTML;
     var unsafeUnwrap = scope.unsafeUnwrap;
     var unwrap = scope.unwrap;
+    var wrap = scope.wrap;
     var shadowHostTable = new WeakMap();
     var nextOlderShadowTreeTable = new WeakMap();
     function ShadowRoot(hostWrapper) {
@@ -3368,6 +3412,28 @@ if (WebComponents.flags.shadow) {
       },
       elementFromPoint: function(x, y) {
         return elementFromPoint(this, this.ownerDocument, x, y);
+      },
+      getSelection: function() {
+        return document.getSelection();
+      },
+      get activeElement() {
+        var unwrappedActiveElement = unwrap(this).ownerDocument.activeElement;
+        if (!unwrappedActiveElement || !unwrappedActiveElement.nodeType) return null;
+        var activeElement = wrap(unwrappedActiveElement);
+        if (activeElement === this.host) {
+          return null;
+        }
+        while (!this.contains(activeElement) && !this.host.contains(activeElement)) {
+          while (activeElement.parentNode) {
+            activeElement = activeElement.parentNode;
+          }
+          if (activeElement.host) {
+            activeElement = activeElement.host;
+          } else {
+            return null;
+          }
+        }
+        return activeElement;
       }
     });
     scope.wrappers.ShadowRoot = ShadowRoot;
@@ -3955,7 +4021,7 @@ if (WebComponents.flags.shadow) {
         unsafeUnwrap(this).removeRange(unwrap(range));
       },
       selectAllChildren: function(node) {
-        unsafeUnwrap(this).selectAllChildren(unwrapIfNeeded(node));
+        unsafeUnwrap(this).selectAllChildren(node instanceof ShadowRoot ? unsafeUnwrap(node.host) : unwrapIfNeeded(node));
       },
       toString: function() {
         return unsafeUnwrap(this).toString();
@@ -4026,6 +4092,7 @@ if (WebComponents.flags.shadow) {
     var ShadowRoot = scope.wrappers.ShadowRoot;
     var TreeScope = scope.TreeScope;
     var cloneNode = scope.cloneNode;
+    var defineGetter = scope.defineGetter;
     var defineWrapGetter = scope.defineWrapGetter;
     var elementFromPoint = scope.elementFromPoint;
     var forwardMethodsToWrapper = scope.forwardMethodsToWrapper;
@@ -4049,6 +4116,22 @@ if (WebComponents.flags.shadow) {
     defineWrapGetter(Document, "documentElement");
     defineWrapGetter(Document, "body");
     defineWrapGetter(Document, "head");
+    defineGetter(Document, "activeElement", function() {
+      var unwrappedActiveElement = unwrap(this).activeElement;
+      if (!unwrappedActiveElement || !unwrappedActiveElement.nodeType) return null;
+      var activeElement = wrap(unwrappedActiveElement);
+      while (!this.contains(activeElement)) {
+        while (activeElement.parentNode) {
+          activeElement = activeElement.parentNode;
+        }
+        if (activeElement.host) {
+          activeElement = activeElement.host;
+        } else {
+          return null;
+        }
+      }
+      return activeElement;
+    });
     function wrapMethod(name) {
       var original = document[name];
       Document.prototype[name] = function() {
@@ -5379,9 +5462,12 @@ if (WebComponents.flags.shadow) {
     };
   }
   scope.URL = jURL;
-})(this);
+})(self);
 
 (function(global) {
+  if (global.JsMutationObserver) {
+    return;
+  }
   var registrationsTable = new WeakMap();
   var setImmediate;
   if (/Trident|Edge/.test(navigator.userAgent)) {
@@ -5677,8 +5763,83 @@ if (WebComponents.flags.shadow) {
     }
   };
   global.JsMutationObserver = JsMutationObserver;
-  if (!global.MutationObserver) global.MutationObserver = JsMutationObserver;
-})(this);
+  if (!global.MutationObserver) {
+    global.MutationObserver = JsMutationObserver;
+    JsMutationObserver._isPolyfilled = true;
+  }
+})(self);
+
+(function(scope) {
+  "use strict";
+  if (!window.performance) {
+    var start = Date.now();
+    window.performance = {
+      now: function() {
+        return Date.now() - start;
+      }
+    };
+  }
+  if (!window.requestAnimationFrame) {
+    window.requestAnimationFrame = function() {
+      var nativeRaf = window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
+      return nativeRaf ? function(callback) {
+        return nativeRaf(function() {
+          callback(performance.now());
+        });
+      } : function(callback) {
+        return window.setTimeout(callback, 1e3 / 60);
+      };
+    }();
+  }
+  if (!window.cancelAnimationFrame) {
+    window.cancelAnimationFrame = function() {
+      return window.webkitCancelAnimationFrame || window.mozCancelAnimationFrame || function(id) {
+        clearTimeout(id);
+      };
+    }();
+  }
+  var workingDefaultPrevented = function() {
+    var e = document.createEvent("Event");
+    e.initEvent("foo", true, true);
+    e.preventDefault();
+    return e.defaultPrevented;
+  }();
+  if (!workingDefaultPrevented) {
+    var origPreventDefault = Event.prototype.preventDefault;
+    Event.prototype.preventDefault = function() {
+      if (!this.cancelable) {
+        return;
+      }
+      origPreventDefault.call(this);
+      Object.defineProperty(this, "defaultPrevented", {
+        get: function() {
+          return true;
+        },
+        configurable: true
+      });
+    };
+  }
+  var isIE = /Trident/.test(navigator.userAgent);
+  if (!window.CustomEvent || isIE && typeof window.CustomEvent !== "function") {
+    window.CustomEvent = function(inType, params) {
+      params = params || {};
+      var e = document.createEvent("CustomEvent");
+      e.initCustomEvent(inType, Boolean(params.bubbles), Boolean(params.cancelable), params.detail);
+      return e;
+    };
+    window.CustomEvent.prototype = window.Event.prototype;
+  }
+  if (!window.Event || isIE && typeof window.Event !== "function") {
+    var origEvent = window.Event;
+    window.Event = function(inType, params) {
+      params = params || {};
+      var e = document.createEvent("Event");
+      e.initEvent(inType, Boolean(params.bubbles), Boolean(params.cancelable));
+      return e;
+    };
+    window.Event.prototype = origEvent.prototype;
+  }
+})(window.WebComponents);
 
 window.HTMLImports = window.HTMLImports || {
   flags: {}
@@ -5755,6 +5916,7 @@ window.HTMLImports = window.HTMLImports || {
     if (importCount) {
       for (var i = 0, imp; i < importCount && (imp = imports[i]); i++) {
         if (isImportLoaded(imp)) {
+          newImports.push(this);
           parsedCount++;
           checkDone();
         } else {
@@ -5881,10 +6043,14 @@ window.HTMLImports.addModule(function(scope) {
       request.open("GET", url, xhr.async);
       request.addEventListener("readystatechange", function(e) {
         if (request.readyState === 4) {
-          var locationHeader = request.getResponseHeader("Location");
           var redirectedUrl = null;
-          if (locationHeader) {
-            var redirectedUrl = locationHeader.substr(0, 1) === "/" ? location.origin + locationHeader : locationHeader;
+          try {
+            var locationHeader = request.getResponseHeader("Location");
+            if (locationHeader) {
+              redirectedUrl = locationHeader.substr(0, 1) === "/" ? location.origin + locationHeader : locationHeader;
+            }
+          } catch (e) {
+            console.error(e.message);
           }
           next.call(nextContext, !xhr.ok(request) && request, request.response || request.responseText, redirectedUrl);
         }
@@ -6034,7 +6200,7 @@ window.HTMLImports.addModule(function(scope) {
   var IMPORT_SELECTOR = "link[rel=" + IMPORT_LINK_TYPE + "]";
   var importParser = {
     documentSelectors: IMPORT_SELECTOR,
-    importsSelectors: [ IMPORT_SELECTOR, "link[rel=stylesheet]", "style", "script:not([type])", 'script[type="application/javascript"]', 'script[type="text/javascript"]' ].join(","),
+    importsSelectors: [ IMPORT_SELECTOR, "link[rel=stylesheet]:not([type])", "style:not([type])", "script:not([type])", 'script[type="application/javascript"]', 'script[type="text/javascript"]' ].join(","),
     map: {
       link: "parseLink",
       script: "parseScript",
@@ -6085,6 +6251,7 @@ window.HTMLImports.addModule(function(scope) {
       }
     },
     parseImport: function(elt) {
+      elt.import = elt.__doc;
       if (window.HTMLImports.__importsParsingHook) {
         window.HTMLImports.__importsParsingHook(elt);
       }
@@ -6147,6 +6314,8 @@ window.HTMLImports.addModule(function(scope) {
     trackElement: function(elt, callback) {
       var self = this;
       var done = function(e) {
+        elt.removeEventListener("load", done);
+        elt.removeEventListener("error", done);
         if (callback) {
           callback(e);
         }
@@ -6184,7 +6353,9 @@ window.HTMLImports.addModule(function(scope) {
       script.src = scriptElt.src ? scriptElt.src : generateScriptDataUrl(scriptElt);
       scope.currentScript = scriptElt;
       this.trackElement(script, function(e) {
-        script.parentNode.removeChild(script);
+        if (script.parentNode) {
+          script.parentNode.removeChild(script);
+        }
         scope.currentScript = null;
       });
       this.addElementToDocument(script);
@@ -6200,7 +6371,7 @@ window.HTMLImports.addModule(function(scope) {
         for (var i = 0, l = nodes.length, p = 0, n; i < l && (n = nodes[i]); i++) {
           if (!this.isParsed(n)) {
             if (this.hasResource(n)) {
-              return nodeIsImport(n) ? this.nextToParseInDoc(n.import, n) : n;
+              return nodeIsImport(n) ? this.nextToParseInDoc(n.__doc, n) : n;
             } else {
               return;
             }
@@ -6223,7 +6394,7 @@ window.HTMLImports.addModule(function(scope) {
       return this.dynamicElements.indexOf(elt) >= 0;
     },
     hasResource: function(node) {
-      if (nodeIsImport(node) && node.import === undefined) {
+      if (nodeIsImport(node) && node.__doc === undefined) {
         return false;
       }
       return true;
@@ -6297,7 +6468,7 @@ window.HTMLImports.addModule(function(scope) {
           }
           this.documents[url] = doc;
         }
-        elt.import = doc;
+        elt.__doc = doc;
       }
       parser.parseNext();
     },
@@ -6393,22 +6564,6 @@ window.HTMLImports.addModule(function(scope) {
   if (scope.useNative) {
     return;
   }
-  if (isIE && typeof window.CustomEvent !== "function") {
-    window.CustomEvent = function(inType, params) {
-      params = params || {};
-      var e = document.createEvent("CustomEvent");
-      e.initCustomEvent(inType, Boolean(params.bubbles), Boolean(params.cancelable), params.detail);
-      e.preventDefault = function() {
-        Object.defineProperty(this, "defaultPrevented", {
-          get: function() {
-            return true;
-          }
-        });
-      };
-      return e;
-    };
-    window.CustomEvent.prototype = window.Event.prototype;
-  }
   initializeModules();
   var rootDocument = scope.rootDocument;
   function bootstrap() {
@@ -6439,6 +6594,7 @@ window.CustomElements = window.CustomElements || {
   scope.addModule = addModule;
   scope.initializeModules = initializeModules;
   scope.hasNative = Boolean(document.registerElement);
+  scope.isIE = /Trident/.test(navigator.userAgent);
   scope.useNative = !flags.register && scope.hasNative && !window.ShadowDOMPolyfill && (!window.HTMLImports || window.HTMLImports.useNative);
 })(window.CustomElements);
 
@@ -6501,32 +6657,27 @@ window.CustomElements.addModule(function(scope) {
   var flags = scope.flags;
   var forSubtree = scope.forSubtree;
   var forDocumentTree = scope.forDocumentTree;
-  function addedNode(node) {
-    return added(node) || addedSubtree(node);
+  function addedNode(node, isAttached) {
+    return added(node, isAttached) || addedSubtree(node, isAttached);
   }
-  function added(node) {
-    if (scope.upgrade(node)) {
+  function added(node, isAttached) {
+    if (scope.upgrade(node, isAttached)) {
       return true;
     }
-    attached(node);
+    if (isAttached) {
+      attached(node);
+    }
   }
-  function addedSubtree(node) {
+  function addedSubtree(node, isAttached) {
     forSubtree(node, function(e) {
-      if (added(e)) {
+      if (added(e, isAttached)) {
         return true;
       }
     });
   }
-  function attachedNode(node) {
-    attached(node);
-    if (inDocument(node)) {
-      forSubtree(node, function(e) {
-        attached(e);
-      });
-    }
-  }
-  var hasPolyfillMutations = !window.MutationObserver || window.MutationObserver === window.JsMutationObserver;
-  scope.hasPolyfillMutations = hasPolyfillMutations;
+  var hasThrottledAttached = window.MutationObserver._isPolyfilled && flags["throttle-attached"];
+  scope.hasPolyfillMutations = hasThrottledAttached;
+  scope.hasThrottledAttached = hasThrottledAttached;
   var isPendingMutations = false;
   var pendingMutations = [];
   function deferMutation(fn) {
@@ -6545,7 +6696,7 @@ window.CustomElements.addModule(function(scope) {
     pendingMutations = [];
   }
   function attached(element) {
-    if (hasPolyfillMutations) {
+    if (hasThrottledAttached) {
       deferMutation(function() {
         _attached(element);
       });
@@ -6554,12 +6705,10 @@ window.CustomElements.addModule(function(scope) {
     }
   }
   function _attached(element) {
-    if (element.__upgraded__ && (element.attachedCallback || element.detachedCallback)) {
-      if (!element.__attached && inDocument(element)) {
-        element.__attached = true;
-        if (element.attachedCallback) {
-          element.attachedCallback();
-        }
+    if (element.__upgraded__ && !element.__attached) {
+      element.__attached = true;
+      if (element.attachedCallback) {
+        element.attachedCallback();
       }
     }
   }
@@ -6570,7 +6719,7 @@ window.CustomElements.addModule(function(scope) {
     });
   }
   function detached(element) {
-    if (hasPolyfillMutations) {
+    if (hasThrottledAttached) {
       deferMutation(function() {
         _detached(element);
       });
@@ -6579,18 +6728,16 @@ window.CustomElements.addModule(function(scope) {
     }
   }
   function _detached(element) {
-    if (element.__upgraded__ && (element.attachedCallback || element.detachedCallback)) {
-      if (element.__attached && !inDocument(element)) {
-        element.__attached = false;
-        if (element.detachedCallback) {
-          element.detachedCallback();
-        }
+    if (element.__upgraded__ && element.__attached) {
+      element.__attached = false;
+      if (element.detachedCallback) {
+        element.detachedCallback();
       }
     }
   }
   function inDocument(element) {
     var p = element;
-    var doc = wrap(document);
+    var doc = window.wrap(document);
     while (p) {
       if (p == doc) {
         return true;
@@ -6608,7 +6755,7 @@ window.CustomElements.addModule(function(scope) {
       }
     }
   }
-  function handler(mutations) {
+  function handler(root, mutations) {
     if (flags.dom) {
       var mx = mutations[0];
       if (mx && mx.type === "childList" && mx.addedNodes) {
@@ -6623,13 +6770,14 @@ window.CustomElements.addModule(function(scope) {
       }
       console.group("mutations (%d) [%s]", mutations.length, u || "");
     }
+    var isAttached = inDocument(root);
     mutations.forEach(function(mx) {
       if (mx.type === "childList") {
         forEach(mx.addedNodes, function(n) {
           if (!n.localName) {
             return;
           }
-          addedNode(n);
+          addedNode(n, isAttached);
         });
         forEach(mx.removedNodes, function(n) {
           if (!n.localName) {
@@ -6651,7 +6799,7 @@ window.CustomElements.addModule(function(scope) {
     }
     var observer = node.__observer;
     if (observer) {
-      handler(observer.takeRecords());
+      handler(node, observer.takeRecords());
       takeMutations();
     }
   }
@@ -6660,7 +6808,7 @@ window.CustomElements.addModule(function(scope) {
     if (inRoot.__observer) {
       return;
     }
-    var observer = new MutationObserver(handler);
+    var observer = new MutationObserver(handler.bind(this, inRoot));
     observer.observe(inRoot, {
       childList: true,
       subtree: true
@@ -6670,7 +6818,8 @@ window.CustomElements.addModule(function(scope) {
   function upgradeDocument(doc) {
     doc = window.wrap(doc);
     flags.dom && console.group("upgradeDocument: ", doc.baseURI.split("/").pop());
-    addedNode(doc);
+    var isMainDocument = doc === window.wrap(document);
+    addedNode(doc, isMainDocument);
     observe(doc);
     flags.dom && console.groupEnd();
   }
@@ -6687,28 +6836,32 @@ window.CustomElements.addModule(function(scope) {
   }
   scope.watchShadow = watchShadow;
   scope.upgradeDocumentTree = upgradeDocumentTree;
+  scope.upgradeDocument = upgradeDocument;
   scope.upgradeSubtree = addedSubtree;
   scope.upgradeAll = addedNode;
-  scope.attachedNode = attachedNode;
+  scope.attached = attached;
   scope.takeRecords = takeRecords;
 });
 
 window.CustomElements.addModule(function(scope) {
   var flags = scope.flags;
-  function upgrade(node) {
+  function upgrade(node, isAttached) {
+    if (node.localName === "template") {
+      if (window.HTMLTemplateElement && HTMLTemplateElement.decorate) {
+        HTMLTemplateElement.decorate(node);
+      }
+    }
     if (!node.__upgraded__ && node.nodeType === Node.ELEMENT_NODE) {
       var is = node.getAttribute("is");
-      var definition = scope.getRegisteredDefinition(is || node.localName);
+      var definition = scope.getRegisteredDefinition(node.localName) || scope.getRegisteredDefinition(is);
       if (definition) {
-        if (is && definition.tag == node.localName) {
-          return upgradeWithDefinition(node, definition);
-        } else if (!is && !definition.extends) {
-          return upgradeWithDefinition(node, definition);
+        if (is && definition.tag == node.localName || !is && !definition.extends) {
+          return upgradeWithDefinition(node, definition, isAttached);
         }
       }
     }
   }
-  function upgradeWithDefinition(element, definition) {
+  function upgradeWithDefinition(element, definition, isAttached) {
     flags.upgrade && console.group("upgrade:", element.localName);
     if (definition.is) {
       element.setAttribute("is", definition.is);
@@ -6716,8 +6869,10 @@ window.CustomElements.addModule(function(scope) {
     implementPrototype(element, definition);
     element.__upgraded__ = true;
     created(element);
-    scope.attachedNode(element);
-    scope.upgradeSubtree(element);
+    if (isAttached) {
+      scope.attached(element);
+    }
+    scope.upgradeSubtree(element, isAttached);
     flags.upgrade && console.groupEnd();
     return element;
   }
@@ -6754,7 +6909,7 @@ window.CustomElements.addModule(function(scope) {
 });
 
 window.CustomElements.addModule(function(scope) {
-  var isIE11OrOlder = scope.isIE11OrOlder;
+  var isIE = scope.isIE;
   var upgradeDocumentTree = scope.upgradeDocumentTree;
   var upgradeAll = scope.upgradeAll;
   var upgradeWithDefinition = scope.upgradeWithDefinition;
@@ -6845,17 +7000,23 @@ window.CustomElements.addModule(function(scope) {
       var nativePrototype = HTMLElement.prototype;
       if (definition.is) {
         var inst = document.createElement(definition.tag);
-        var expectedPrototype = Object.getPrototypeOf(inst);
-        if (expectedPrototype === definition.prototype) {
-          nativePrototype = expectedPrototype;
-        }
+        nativePrototype = Object.getPrototypeOf(inst);
       }
       var proto = definition.prototype, ancestor;
-      while (proto && proto !== nativePrototype) {
+      var foundPrototype = false;
+      while (proto) {
+        if (proto == nativePrototype) {
+          foundPrototype = true;
+        }
         ancestor = Object.getPrototypeOf(proto);
-        proto.__proto__ = ancestor;
+        if (ancestor) {
+          proto.__proto__ = ancestor;
+        }
         proto = ancestor;
       }
+      if (!foundPrototype) {
+        console.warn(definition.tag + " prototype not found in prototype chain for " + definition.is);
+      }
       definition.native = nativePrototype;
     }
   }
@@ -6917,6 +7078,9 @@ window.CustomElements.addModule(function(scope) {
   var isInstance;
   if (!Object.__proto__ && !useNative) {
     isInstance = function(obj, ctor) {
+      if (obj instanceof ctor) {
+        return true;
+      }
       var p = obj;
       while (p) {
         if (p === ctor.prototype) {
@@ -6941,7 +7105,7 @@ window.CustomElements.addModule(function(scope) {
   }
   wrapDomMethodToForceUpgrade(Node.prototype, "cloneNode");
   wrapDomMethodToForceUpgrade(document, "importNode");
-  if (isIE11OrOlder) {
+  if (isIE) {
     (function() {
       var importNode = document.importNode;
       document.importNode = function() {
@@ -6969,7 +7133,7 @@ window.CustomElements.addModule(function(scope) {
 (function(scope) {
   var useNative = scope.useNative;
   var initializeModules = scope.initializeModules;
-  var isIE11OrOlder = /Trident/.test(navigator.userAgent);
+  var isIE = scope.isIE;
   if (useNative) {
     var nop = function() {};
     scope.watchShadow = nop;
@@ -6985,6 +7149,7 @@ window.CustomElements.addModule(function(scope) {
     initializeModules();
   }
   var upgradeDocumentTree = scope.upgradeDocumentTree;
+  var upgradeDocument = scope.upgradeDocument;
   if (!window.wrap) {
     if (window.ShadowDOMPolyfill) {
       window.wrap = window.ShadowDOMPolyfill.wrapIfNeeded;
@@ -6995,39 +7160,30 @@ window.CustomElements.addModule(function(scope) {
       };
     }
   }
+  if (window.HTMLImports) {
+    window.HTMLImports.__importsParsingHook = function(elt) {
+      if (elt.import) {
+        upgradeDocument(wrap(elt.import));
+      }
+    };
+  }
   function bootstrap() {
     upgradeDocumentTree(window.wrap(document));
-    if (window.HTMLImports) {
-      window.HTMLImports.__importsParsingHook = function(elt) {
-        upgradeDocumentTree(wrap(elt.import));
-      };
-    }
     window.CustomElements.ready = true;
-    setTimeout(function() {
-      window.CustomElements.readyTime = Date.now();
-      if (window.HTMLImports) {
-        window.CustomElements.elapsed = window.CustomElements.readyTime - window.HTMLImports.readyTime;
-      }
-      document.dispatchEvent(new CustomEvent("WebComponentsReady", {
-        bubbles: true
-      }));
-    });
-  }
-  if (isIE11OrOlder && typeof window.CustomEvent !== "function") {
-    window.CustomEvent = function(inType, params) {
-      params = params || {};
-      var e = document.createEvent("CustomEvent");
-      e.initCustomEvent(inType, Boolean(params.bubbles), Boolean(params.cancelable), params.detail);
-      e.preventDefault = function() {
-        Object.defineProperty(this, "defaultPrevented", {
-          get: function() {
-            return true;
-          }
-        });
-      };
-      return e;
+    var requestAnimationFrame = window.requestAnimationFrame || function(f) {
+      setTimeout(f, 16);
     };
-    window.CustomEvent.prototype = window.Event.prototype;
+    requestAnimationFrame(function() {
+      setTimeout(function() {
+        window.CustomElements.readyTime = Date.now();
+        if (window.HTMLImports) {
+          window.CustomElements.elapsed = window.CustomElements.readyTime - window.HTMLImports.readyTime;
+        }
+        document.dispatchEvent(new CustomEvent("WebComponentsReady", {
+          bubbles: true
+        }));
+      });
+    });
   }
   if (document.readyState === "complete" || scope.flags.eager) {
     bootstrap();
@@ -7037,7 +7193,6 @@ window.CustomElements.addModule(function(scope) {
     var loadEvent = window.HTMLImports && !window.HTMLImports.ready ? "HTMLImportsLoaded" : "DOMContentLoaded";
     window.addEventListener(loadEvent, bootstrap);
   }
-  scope.isIE11OrOlder = isIE11OrOlder;
 })(window.CustomElements);
 
 (function(scope) {
@@ -7055,66 +7210,6 @@ window.CustomElements.addModule(function(scope) {
 })(window.WebComponents);
 
 (function(scope) {
-  "use strict";
-  if (!window.performance) {
-    var start = Date.now();
-    window.performance = {
-      now: function() {
-        return Date.now() - start;
-      }
-    };
-  }
-  if (!window.requestAnimationFrame) {
-    window.requestAnimationFrame = function() {
-      var nativeRaf = window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
-      return nativeRaf ? function(callback) {
-        return nativeRaf(function() {
-          callback(performance.now());
-        });
-      } : function(callback) {
-        return window.setTimeout(callback, 1e3 / 60);
-      };
-    }();
-  }
-  if (!window.cancelAnimationFrame) {
-    window.cancelAnimationFrame = function() {
-      return window.webkitCancelAnimationFrame || window.mozCancelAnimationFrame || function(id) {
-        clearTimeout(id);
-      };
-    }();
-  }
-  var elementDeclarations = [];
-  var polymerStub = function(name, dictionary) {
-    if (typeof name !== "string" && arguments.length === 1) {
-      Array.prototype.push.call(arguments, document._currentScript);
-    }
-    elementDeclarations.push(arguments);
-  };
-  window.Polymer = polymerStub;
-  scope.consumeDeclarations = function(callback) {
-    scope.consumeDeclarations = function() {
-      throw "Possible attempt to load Polymer twice";
-    };
-    if (callback) {
-      callback(elementDeclarations);
-    }
-    elementDeclarations = null;
-  };
-  function installPolymerWarning() {
-    if (window.Polymer === polymerStub) {
-      window.Polymer = function() {
-        throw new Error("You tried to use polymer without loading it first. To " + 'load polymer, <link rel="import" href="' + 'components/polymer/polymer.html">');
-      };
-    }
-  }
-  if (HTMLImports.useNative) {
-    installPolymerWarning();
-  } else {
-    window.addEventListener("DOMContentLoaded", installPolymerWarning);
-  }
-})(window.WebComponents);
-
-(function(scope) {
   var style = document.createElement("style");
   style.textContent = "" + "body {" + "transition: opacity ease-in 0.2s;" + " } \n" + "body[unresolved] {" + "opacity: 0; display: block; overflow: hidden; position: relative;" + " } \n";
   var head = document.querySelector("head");