Reduce usage of webkit CSS prefixes in chrome/browser/resources

chrome/browser/resources/chromeos/login/oobe_screen_user_image.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.
 
 /**
  * @fileoverview Oobe user image screen implementation.
  */
 
 login.createScreen('UserImageScreen', 'user-image', function() {
   var CONTEXT_KEY_IS_CAMERA_PRESENT = 'isCameraPresent';
@@ skipping 39 matching lines @@
 
       $('take-photo').addEventListener(
           'click', this.handleTakePhoto_.bind(this));
       $('discard-photo').addEventListener(
           'click', this.handleDiscardPhoto_.bind(this));
 
       // Toggle 'animation' class for the duration of WebKit transition.
       $('flip-photo').addEventListener(
           'click', this.handleFlipPhoto_.bind(this));
       $('user-image-stream-crop').addEventListener(
-          'webkitTransitionEnd', function(e) {
+          'transitionend', function(e) {
             previewElement.classList.remove('animation');
           });
       $('user-image-preview-img').addEventListener(
-          'webkitTransitionEnd', function(e) {
+          'transitionend', function(e) {
             previewElement.classList.remove('animation');
           });
 
       var self = this;
       this.context.addObserver(CONTEXT_KEY_IS_CAMERA_PRESENT,
                                function(present) {
         $('user-image-grid').cameraPresent = present;
       });
       this.context.addObserver(CONTEXT_KEY_SELECTED_IMAGE_URL,
                                this.setSelectedImage_);
@@ skipping 311 matching lines @@
      */
     notifyImageSelected_: function() {
       var imageGrid = $('user-image-grid');
       chrome.send('selectImage',
                   [imageGrid.selectedItemUrl,
                    imageGrid.selectionType,
                    !imageGrid.inProgramSelection]);
     }
   };
 });