Revert "Polymer elements added to third_party/polymer."

third_party/polymer/components/core-collapse/core-collapse.html

-<!--
-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
--->
-
-<!--
-`core-collapse` creates a collapsible block of content.  By default, the content
-will be collapsed.  Use `opened` to show/hide the content.
-
-    <button on-click="{{toggle}}">toggle collapse</button>
-    
-    <core-collapse id="collapse">
-      ...
-    </core-collapse>
-    
-    ...
-
-    toggle: function() {
-      this.$.collapse.toggle();
-    }
-
-@group Polymer Core Elements
-@element core-collapse
--->
-
-<link rel="import" href="../polymer/polymer.html">
-
-<link rel="stylesheet" href="core-collapse.css" shim-shadowdom>
-
-<polymer-element name="core-collapse" attributes="target horizontal opened duration fixedSize">
-<template>
-
-  <content></content>
-
-</template>
-<script>
-
-  Polymer('core-collapse', {
-    /**
-     * Fired when the target element has been resized as a result of the opened
-     * state changing.
-     * 
-     * @event core-resize
-    */
-
-    /**
-     * The target element.
-     *
-     * @attribute target
-     * @type object
-     * @default null
-     */
-    target: null,
-
-    /**
-     * If true, the orientation is horizontal; otherwise is vertical.
-     *
-     * @attribute horizontal
-     * @type boolean
-     * @default false
-     */
-    horizontal: false,
-
-    /**
-     * Set opened to true to show the collapse element and to false to hide it.
-     *
-     * @attribute opened
-     * @type boolean
-     * @default false
-     */
-    opened: false,
-
-    /**
-     * Collapsing/expanding animation duration in second.
-     *
-     * @attribute duration
-     * @type number
-     * @default 0.33
-     */
-    duration: 0.33,
-
-    /**
-     * If true, the size of the target element is fixed and is set
-     * on the element.  Otherwise it will try to 
-     * use auto to determine the natural size to use
-     * for collapsing/expanding.
-     *
-     * @attribute fixedSize
-     * @type boolean
-     * @default false
-     */
-    fixedSize: false,
-
-    created: function() {
-      this.transitionEndListener = this.transitionEnd.bind(this);
-    },
-    
-    ready: function() {
-      this.target = this.target || this;
-    },
-
-    domReady: function() {
-      this.async(function() {
-        this.afterInitialUpdate = true;
-      });
-    },
-
-    detached: function() {
-      if (this.target) {
-        this.removeListeners(this.target);
-      }
-    },
-
-    targetChanged: function(old) {
-      if (old) {
-        this.removeListeners(old);
-      }
-      if (!this.target) {
-        return;
-      }
-      this.isTargetReady = !!this.target;
-      this.classList.toggle('core-collapse-closed', this.target !== this);
-      this.target.style.overflow = 'hidden';
-      this.horizontalChanged();
-      this.addListeners(this.target);
-      // set core-collapse-closed class initially to hide the target
-      this.toggleClosedClass(true);
-      this.update();
-    },
-
-    addListeners: function(node) {
-      node.addEventListener('transitionend', this.transitionEndListener);
-    },
-
-    removeListeners: function(node) {
-      node.removeEventListener('transitionend', this.transitionEndListener);
-    },
-
-    horizontalChanged: function() {
-      this.dimension = this.horizontal ? 'width' : 'height';
-    },
-
-    openedChanged: function() {
-      this.update();
-    },
-
-    /**
-     * Toggle the opened state.
-     *
-     * @method toggle
-     */
-    toggle: function() {
-      this.opened = !this.opened;
-    },
-
-    setTransitionDuration: function(duration) {
-      var s = this.target.style;
-      s.transition = duration ? (this.dimension + ' ' + duration + 's') : null;
-      if (duration === 0) {
-        this.async('transitionEnd');
-      }
-    },
-
-    transitionEnd: function() {
-      if (this.opened && !this.fixedSize) {
-        this.updateSize('auto', null);
-      }
-      this.setTransitionDuration(null);
-      this.toggleClosedClass(!this.opened);
-      this.asyncFire('core-resize', null, this.target);
-    },
-
-    toggleClosedClass: function(closed) {
-      this.hasClosedClass = closed;
-      this.target.classList.toggle('core-collapse-closed', closed);
-    },
-
-    updateSize: function(size, duration, forceEnd) {
-      this.setTransitionDuration(duration);
-      this.calcSize();
-      var s = this.target.style;
-      var nochange = s[this.dimension] === size;
-      s[this.dimension] = size;
-      // transitonEnd will not be called if the size has not changed
-      if (forceEnd && nochange) {
-        this.transitionEnd();
-      }
-    },
-
-    update: function() {
-      if (!this.target) {
-        return;
-      }
-      if (!this.isTargetReady) {
-        this.targetChanged(); 
-      }
-      this.horizontalChanged();
-      this[this.opened ? 'show' : 'hide']();
-    },
-
-    calcSize: function() {
-      return this.target.getBoundingClientRect()[this.dimension] + 'px';
-    },
-
-    getComputedSize: function() {
-      return getComputedStyle(this.target)[this.dimension];
-    },
-
-    show: function() {
-      this.toggleClosedClass(false);
-      // for initial update, skip the expanding animation to optimize
-      // performance e.g. skip calcSize
-      if (!this.afterInitialUpdate) {
-        this.transitionEnd();
-        return;
-      }
-      if (!this.fixedSize) {
-        this.updateSize('auto', null);
-        var s = this.calcSize();
-        this.updateSize(0, null);
-      }
-      this.async(function() {
-        this.updateSize(this.size || s, this.duration, true);
-      });
-    },
-
-    hide: function() {
-      // don't need to do anything if it's already hidden
-      if (this.hasClosedClass && !this.fixedSize) {
-        return;
-      }
-      if (this.fixedSize) {
-        // save the size before hiding it
-        this.size = this.getComputedSize();
-      } else {
-        this.updateSize(this.calcSize(), null);
-      }
-      this.async(function() {
-        this.updateSize(0, this.duration);
-      });
-    }
-
-  });
-
-</script>
-</polymer-element>