Remove keyIdentifier usage in chrome/browser/resources/*

chrome/browser/resources/ntp4/dot_list.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 DotList implementation
  */
 
 cr.define('ntp', function() {
   'use strict';
@@ skipping 30 matching lines @@
     /**
      * Handler for key events on the dot list. These keys will change the focus
      * element.
      * @param {Event} e The KeyboardEvent.
      */
     onKeyDown_: function(e) {
       if (e.metaKey || e.shiftKey || e.altKey || e.ctrlKey)
         return;
 
       var direction = 0;
-      if (e.keyIdentifier == 'Left')
+      if (e.key == 'ArrowLeft')
         direction = -1;
-      else if (e.keyIdentifier == 'Right')
+      else if (e.key == 'ArrowRight')
         direction = 1;
       else
         return;
 
       var focusDot = this.querySelector('.dot:focus');
       if (!focusDot)
         return;
       var focusIndex = Array.prototype.indexOf.call(navDots, focusDot);
       var newFocusIndex = focusIndex + direction;
       if (focusIndex == newFocusIndex)
         return;
 
       newFocusIndex = (newFocusIndex + navDots.length) % navDots.length;
       navDots[newFocusIndex].tabIndex = 3;
       navDots[newFocusIndex].focus();
       focusDot.tabIndex = -1;
 
       e.stopPropagation();
       e.preventDefault();
     }
   };
 
   return {
     DotList: DotList
   };
 });