Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/components/neon-animation/neon-animated-pages.html

-<!--
-Copyright (c) 2015 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
--->
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../iron-resizable-behavior/iron-resizable-behavior.html">
-<link rel="import" href="../iron-selector/iron-selectable.html">
-<link rel="import" href="neon-animation-runner-behavior.html">
-<link rel="import" href="animations/opaque-animation.html">
-
-<!--
-`neon-animated-pages` manages a set of pages and runs an animation when switching between them. Its
-children pages should implement `Polymer.NeonAnimatableBehavior` and define `entry` and `exit`
-animations to be run when switching to or switching out of the page.
-
-@group Neon Elements
-@element neon-animated-pages
-@demo demo/index.html
--->
-
-<dom-module id="neon-animated-pages">
-
-  <style>
-
-    :host {
-      display: block;
-      position: relative;
-    }
-
-    :host > ::content > * {
-      position: absolute;
-      top: 0;
-      left: 0;
-      bottom: 0;
-      right: 0;
-      height: 100%;
-    }
-
-    :host > ::content > :not(.iron-selected):not(.neon-animating) {
-      display: none !important;
-    }
-
-    :host > ::content > .neon-animating {
-      pointer-events: none;
-    }
-
-  </style>
-
-  <template>
-    <content id="content"></content>
-  </template>
-
-</dom-module>
-
-<script>
-(function() {
-
-  Polymer({
-
-    is: 'neon-animated-pages',
-
-    behaviors: [
-      Polymer.IronResizableBehavior,
-      Polymer.IronSelectableBehavior,
-      Polymer.NeonAnimationRunnerBehavior
-    ],
-
-    properties: {
-
-      activateEvent: {
-        type: String,
-        value: ''
-      },
-
-      // if true, the initial page selection will also be animated according to its animation config.
-      animateInitialSelection: {
-        type: Boolean,
-        value: false
-      }
-
-    },
-
-    observers: [
-      '_selectedChanged(selected)'
-    ],
-
-    listeners: {
-      'neon-animation-finish': '_onNeonAnimationFinish'
-    },
-
-    _selectedChanged: function(selected) {
-
-      var selectedPage = this.selectedItem;
-      var oldPage = this._valueToItem(this._prevSelected) || false;
-      this._prevSelected = selected;
-
-      // on initial load and if animateInitialSelection is negated, simply display selectedPage.
-      if (!oldPage && !this.animateInitialSelection) {
-        this._completeSelectedChanged();
-        return;
-      }
-
-      // insert safari fix.
-      this.animationConfig = [{
-        name: 'opaque-animation',
-        node: selectedPage
-      }];
-
-      // configure selectedPage animations.
-      if (this.entryAnimation) {
-        this.animationConfig.push({
-          name: this.entryAnimation,
-          node: selectedPage
-        });
-      } else {
-        if (selectedPage.getAnimationConfig) {
-          this.animationConfig.push({
-            animatable: selectedPage,
-            type: 'entry'
-          });
-        }
-      }
-
-      // configure oldPage animations iff exists.
-      if (oldPage) {
-
-        // cancel the currently running animation if one is ongoing.
-        if (oldPage.classList.contains('neon-animating')) {
-          this._squelchNextFinishEvent = true;
-          this.cancelAnimation();
-          this._completeSelectedChanged();
-        }
-
-        // configure the animation.
-        if (this.exitAnimation) {
-          this.animationConfig.push({
-            name: this.exitAnimation,
-            node: oldPage
-          });
-        } else {
-          if (oldPage.getAnimationConfig) {
-            this.animationConfig.push({
-              animatable: oldPage,
-              type: 'exit'
-            });
-          }
-        }
-
-        // display the oldPage during the transition.
-        oldPage.classList.add('neon-animating');
-      }
-
-      // display the selectedPage during the transition.
-      selectedPage.classList.add('neon-animating');
-
-      // actually run the animations.
-      if (this.animationConfig.length > 1) {
-
-        // on first load, ensure we run animations only after element is attached.
-        if (!this.isAttached) {
-          this.async(function () {
-            this.playAnimation(undefined, {
-              fromPage: null,
-              toPage: selectedPage
-            });
-          });
-
-        } else {
-          this.playAnimation(undefined, {
-            fromPage: oldPage,
-            toPage: selectedPage
-          });
-        }
-
-      } else {
-        this._completeSelectedChanged(oldPage, selectedPage);
-      }
-    },
-
-    /**
-     * @param {Object=} oldPage
-     * @param {Object=} selectedPage
-     */
-    _completeSelectedChanged: function(oldPage, selectedPage) {
-      if (selectedPage) {
-        selectedPage.classList.remove('neon-animating');
-      }
-      if (oldPage) {
-        oldPage.classList.remove('neon-animating');
-      }
-      if (!selectedPage || !oldPage) {
-        var nodes = Polymer.dom(this.$.content).getDistributedNodes();
-        for (var node, index = 0; node = nodes[index]; index++) {
-          node.classList && node.classList.remove('neon-animating');
-        }
-      }
-      this.async(this._notifyPageResize);
-    },
-
-    _onNeonAnimationFinish: function(event) {
-      if (this._squelchNextFinishEvent) {
-        this._squelchNextFinishEvent = false;
-        return;
-      }
-      this._completeSelectedChanged(event.detail.fromPage, event.detail.toPage);
-    },
-
-    _notifyPageResize: function() {
-      var selectedPage = this.selectedItem;
-      this.resizerShouldNotify = function(element) {
-        return element == selectedPage;
-      }
-      this.notifyResize();
-    }
-
-  })
-
-})();
-</script>