Remove the use of KeyEvent.keyIdentifier.

ui/file_manager/file_manager/foreground/js/naming_controller.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.
 
 /**
  * Controller to handle naming.
  *
  * @param {!ListContainer} listContainer
  * @param {!cr.ui.dialogs.AlertDialog} alertDialog
  * @param {!cr.ui.dialogs.ConfirmDialog} confirmDialog
@@ skipping 198 matching lines @@
 
 /**
  * @param {Event} event Key event.
  * @private
  */
 NamingController.prototype.onRenameInputKeyDown_ = function(event) {
   if (!this.isRenamingInProgress())
     return;
 
   // Do not move selection or lead item in list during rename.
-  if (event.keyIdentifier == 'Up' || event.keyIdentifier == 'Down') {
+  if (event.key === 'ArrowUp' || event.key === 'ArrowDown') {
     event.stopPropagation();
   }
 
-  switch (util.getKeyModifiers(event) + event.keyIdentifier) {
-    case 'U+001B':  // Escape
+  switch (util.getKeyModifiers(event) + event.key) {
+    case 'Escape':
       this.cancelRename_();
       event.preventDefault();
       break;
 
     case 'Enter':
       this.commitRename_();
       event.preventDefault();
       break;
   }
 };
@@ skipping 101 matching lines @@
 
   var parent = this.listContainer_.renameInput.parentNode;
   if (parent)
     parent.removeChild(this.listContainer_.renameInput);
 
   this.listContainer_.endBatchUpdates();
 
   // Focus may go out of the list. Back it to the list.
   this.listContainer_.currentList.focus();
 };