Reduce webkit CSS prefixes in ui/ styles

ui/webui/resources/js/cr/ui/page_manager/page.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.
 
 <include src="../node_utils.js">
 
 cr.define('cr.ui.pageManager', function() {
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
@@ skipping 224 matching lines @@
           pageDiv.hidden = false;
           pageDiv.page = this;
         }
         return;
       }
 
       var self = this;
       var loading = PageManager.isLoading();
       if (!loading) {
         // TODO(flackr): Use an event delegate to avoid having to subscribe and
-        // unsubscribe for webkitTransitionEnd events.
-        container.addEventListener('webkitTransitionEnd', function f(e) {
+        // unsubscribe for transitionend events.
+        container.addEventListener('transitionend', function f(e) {
             var propName = e.propertyName;
             if (e.target != e.currentTarget ||
                 (propName && propName != 'opacity')) {
               return;
             }
-            container.removeEventListener('webkitTransitionEnd', f);
+            container.removeEventListener('transitionend', f);
             self.fadeCompleted_();
         });
-        // -webkit-transition is 200ms. Let's wait for 400ms.
+        // transition is 200ms. Let's wait for 400ms.
         ensureTransitionEndEvent(container, 400);
       }
 
       if (visible) {
         container.hidden = false;
         pageDiv.hidden = false;
         pageDiv.page = this;
         // NOTE: This is a hacky way to force the container to layout which
-        // will allow us to trigger the webkit transition.
+        // will allow us to trigger the transition.
         /** @suppress {uselessCode} */
         container.scrollTop;
 
         this.pageDiv.removeAttribute('aria-hidden');
         if (this.parentPage) {
           this.parentPage.pageDiv.parentElement.setAttribute('aria-hidden',
                                                              true);
         }
         container.classList.remove('transparent');
         PageManager.onPageVisibilityChanged(this);
@@ skipping 23 matching lines @@
         PageManager.onPageVisibilityChanged(this);
       }
     },
   };
 
   // Export
   return {
     Page: Page
   };
 });