Convert Event#keyIdentifier (deprecated) to Event#key

ui/webui/resources/js/cr/ui/tabs.js

 // Copyright (c) 2011 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('cr.ui', function() {
 
   /**
    * Returns the TabBox for a Tab or a TabPanel.
    * @param {Tab|TabPanel} el The tab or tabpanel element.
    * @return {TabBox} The tab box if found.
@@ skipping 132 matching lines @@
     },
 
     /**
      * Handle keydown to change the selected tab when the user presses the
      * arrow keys.
      * @param {Event} e The keyboard event.
      * @private
      */
     handleKeyDown_: function(e) {
       var delta = 0;
-      switch (e.keyIdentifier) {
-        case 'Left':
-        case 'Up':
+      switch (e.key) {
+        case 'ArrowLeft':
+        case 'ArrowUp':
           delta = -1;
           break;
-        case 'Right':
-        case 'Down':
+        case 'ArrowRight':
+        case 'ArrowDown':
           delta = 1;
           break;
       }
 
       if (!delta)
         return;
 
       var cs = this.ownerDocument.defaultView.getComputedStyle(this);
       if (cs.direction == 'rtl')
         delta *= -1;
@@ skipping 62 matching lines @@
   cr.defineProperty(TabPanel, 'selected', cr.PropertyKind.BOOL_ATTR);
 
   return {
     TabBox: TabBox,
     Tabs: Tabs,
     Tab: Tab,
     TabPanels: TabPanels,
     TabPanel: TabPanel
   };
 });