Remove webkit prefixes for CSS Animation in chrome/ styles

chrome/browser/resources/ntp4/tile_page.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('ntp', function() {
   'use strict';
 
   // We can't pass the currently dragging tile via dataTransfer because of
   // http://crbug.com/31037
   var currentlyDraggingTile = null;
@@ skipping 42 matching lines @@
       // 'real' as opposed to doppleganger.
       this.className = 'tile real';
       this.appendChild(contents);
       contents.tile = this;
 
       this.addEventListener('dragstart', this.onDragStart_);
       this.addEventListener('drag', this.onDragMove_);
       this.addEventListener('dragend', this.onDragEnd_);
 
       this.firstChild.addEventListener(
-          'webkitAnimationEnd', this.onContentsAnimationEnd_.bind(this));
+          'animationend', this.onContentsAnimationEnd_.bind(this));
 
       this.eventTracker = new EventTracker();
     },
 
     get index() {
       return Array.prototype.indexOf.call(this.tilePage.tileElements_, this);
     },
 
     get tilePage() {
       return findAncestorByClass(this, 'tile-page');
@@ skipping 223 matching lines @@
      * @param {boolean=} opt_animate Whether the animation should be animated.
      */
     doRemove: function(opt_animate) {
       if (opt_animate)
         this.firstChild.classList.add('removing-tile-contents');
       else
         this.tilePage.removeTile(this, false);
     },
 
     /**
-     * Callback for the webkitAnimationEnd event on the tile's contents.
+     * Callback for the animationend event on the tile's contents.
      * @param {Event} e The event object.
      */
     onContentsAnimationEnd_: function(e) {
       if (this.firstChild.classList.contains('new-tile-contents'))
         this.firstChild.classList.remove('new-tile-contents');
       if (this.firstChild.classList.contains('removing-tile-contents'))
         this.tilePage.removeTile(this, true);
     },
   };
 
@@ skipping 997 matching lines @@
   };
 
   return {
     getCurrentlyDraggingTile: getCurrentlyDraggingTile,
     setCurrentDropEffect: setCurrentDropEffect,
     // Not used outside, just for usage in JSDoc inside this file.
     Tile: Tile,
     TilePage: TilePage,
   };
 });