Remove keyIdentifier usage in chrome/browser/resources/*

chrome/browser/resources/ntp4/tile_page.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.
 
 cr.define('ntp', function() {
   'use strict';
 
   // We can't pass the currently dragging tile via dataTransfer because of
   // http://crbug.com/31037
   var currentlyDraggingTile = null;
@@ skipping 687 matching lines @@
       // We only handle up, down, left, right without control keys.
       if (e.metaKey || e.shiftKey || e.altKey || e.ctrlKey)
         return;
 
       // Wrap the given index to |this.focusableElements_|.
       var wrap = function(idx) {
         return (idx + this.focusableElements_.length) %
             this.focusableElements_.length;
       }.bind(this);
 
-      switch (e.keyIdentifier) {
-        case 'Right':
-        case 'Left':
-          var direction = e.keyIdentifier == 'Right' ? 1 : -1;
+      switch (e.key) {
+        case 'ArrowRight':
+        case 'ArrowLeft':
+          var direction = e.key == 'ArrowRight' ? 1 : -1;
           this.focusElementIndex_ = wrap(this.focusElementIndex_ + direction);
           break;
-        case 'Up':
-        case 'Down':
+        case 'ArrowUp':
+        case 'ArrowDown':
           // Look through all focusable elements. Find the first one that is
           // in the same column.
-          var direction = e.keyIdentifier == 'Up' ? -1 : 1;
+          var direction = e.key == 'ArrowUp' ? -1 : 1;
           var currentIndex =
               Array.prototype.indexOf.call(this.focusableElements_,
                                            this.currentFocusElement_);
           var newFocusIdx = wrap(currentIndex + direction);
           var tile = this.currentFocusElement_.parentNode;
           for (;; newFocusIdx = wrap(newFocusIdx + direction)) {
             var newTile = this.focusableElements_[newFocusIdx].parentNode;
             var rowTiles = this.layoutValues_.numRowTiles;
             if ((newTile.index - tile.index) % rowTiles == 0)
               break;
@@ skipping 598 matching lines @@
   };
 
   return {
     getCurrentlyDraggingTile: getCurrentlyDraggingTile,
     setCurrentDropEffect: setCurrentDropEffect,
     // Not used outside, just for usage in JSDoc inside this file.
     Tile: Tile,
     TilePage: TilePage,
   };
 });