Convert Event#keyIdentifier (deprecated) to Event#key

ui/webui/resources/js/cr/ui/focus_row.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.
 
 cr.define('cr.ui', function() {
   /**
    * A class to manage focus between given horizontally arranged elements.
    *
    * Pressing left cycles backward and pressing right cycles forward in item
    * order. Pressing Home goes to the beginning of the list and End goes to the
@@ skipping 253 matching lines @@
       assert(elementIndex >= 0);
 
       if (this.delegate && this.delegate.onKeydown(this, e))
         return;
 
       if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey)
         return;
 
       var index = -1;
 
-      if (e.keyIdentifier == 'Left')
+      if (e.key == 'ArrowLeft')
         index = elementIndex + (isRTL() ? 1 : -1);
-      else if (e.keyIdentifier == 'Right')
+      else if (e.key == 'ArrowRight')
         index = elementIndex + (isRTL() ? -1 : 1);
-      else if (e.keyIdentifier == 'Home')
+      else if (e.key == 'Home')
         index = 0;
-      else if (e.keyIdentifier == 'End')
+      else if (e.key == 'End')
         index = elements.length - 1;
 
       var elementToFocus = elements[index];
       if (elementToFocus) {
         this.getEquivalentElement(elementToFocus).focus();
         e.preventDefault();
       }
     },
   };
 
   return {
     FocusRow: FocusRow,
   };
 });