Added accessible title, icon-title and notification for factory reset screen.

chrome/browser/resources/chromeos/login/oobe_screen_reset.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.
 
 /**
  * @fileoverview Device reset screen implementation.
  */
 
 login.createScreen('ResetScreen', 'reset', function() {
   return {
@@ skipping 50 matching lines @@
       });
       buttons.push(cancelButton);
 
       return buttons;
     },
 
     /**
      * Returns a control which should receive an initial focus.
      */
     get defaultControl() {
-      return $('reset-cancel-button');
+      return $('reset-button');
     },
 
     /**
      * Cancels the reset and drops the user back to the login screen.
      */
     cancel: function() {
       chrome.send('cancelOnReset');
     },
 
     /**
@@ skipping 63 matching lines @@
       * @param {bool} can_rollback. If Rollback is available on reset screen.
       * @private
       */
     setRollbackAvailable_: function(show_rollback) {
       this.classList.toggle('norollback', !show_rollback);
       this.showRollback = show_rollback;
     },
 
     updateViewOnRollbackCall: function() {
       this.classList.add('revert-promise');
+      this.announceAccessibleMessage_(
+          loadTimeData.getString('resetRevertSpinnerMessage'));
     }
   };
 });