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

chrome/browser/resources/chromeos/login/screen_supervised_user_creation.js

 // Copyright 2014 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 Legacy supervised user creation flow screen.
  */
 
 login.createScreen('SupervisedUserCreationScreen',
                    'supervised-user-creation', function() {
@@ skipping 591 matching lines @@
 
       this.getScreenElement('take-photo').addEventListener(
           'click', this.handleTakePhoto_.bind(this));
       this.getScreenElement('discard-photo').addEventListener(
           'click', this.handleDiscardPhoto_.bind(this));
 
       // Toggle 'animation' class for the duration of WebKit transition.
       this.getScreenElement('flip-photo').addEventListener(
           'click', this.handleFlipPhoto_.bind(this));
       this.getScreenElement('image-stream-crop').addEventListener(
-          'webkitTransitionEnd', function(e) {
+          'transitionend', function(e) {
             previewElement.classList.remove('animation');
           });
       this.getScreenElement('image-preview-img').addEventListener(
-          'webkitTransitionEnd', function(e) {
+          'transitionend', function(e) {
             previewElement.classList.remove('animation');
           });
 
       $('supervised-user-creation-navigation').addEventListener('close',
           this.cancel.bind(this));
     },
 
     buttonIds: [],
 
     /**
@@ skipping 955 matching lines @@
 
       if (selectedIndex >= 0)
         this.importList_.selectPod(this.importList_.pods[selectedIndex]);
 
       if (this.currentPage_ == 'username')
         this.getScreenElement('import-link').hidden = (userList.length == 0);
     },
   };
 });