Remove keyIdentifier usage in chrome/browser/resources/*

chrome/browser/resources/chromeos/wallpaper_manager/js/wallpaper_images_grid.js

 // Copyright (c) 2013 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('wallpapers', function() {
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
   /** @const */ var Grid = cr.ui.Grid;
   /** @const */ var GridItem = cr.ui.GridItem;
   /** @const */ var GridSelectionController = cr.ui.GridSelectionController;
   /** @const */ var ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
@@ skipping 190 matching lines @@
 
     /** @override */
     getIndexAfter: function(index) {
       var result =
           GridSelectionController.prototype.getIndexAfter.call(this, index);
       return result == -1 ? this.getFirstIndex() : result;
     },
 
     /** @override */
     handleKeyDown: function(e) {
-      if (e.keyIdentifier == 'Enter')
+      if (e.key == 'Enter')
         cr.dispatchSimpleEvent(this.grid_, 'activate');
       else
         GridSelectionController.prototype.handleKeyDown.call(this, e);
     },
   };
 
   /**
    * Creates a new user images grid element.
    * @param {Object=} opt_propertyBag Optional properties.
    * @constructor
@@ skipping 214 matching lines @@
       // The active thumbnail maybe deleted in the above redraw(). Sets it again
       // to make sure checkmark shows correctly.
       this.updateActiveThumb_();
     }
   };
 
   return {
     WallpaperThumbnailsGrid: WallpaperThumbnailsGrid
   };
 });