Implemented scanning by group

chrome/browser/resources/chromeos/switch_access/switch_access_interface.js

 // Copyright 2017 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.
 
 /**
  * Interface for controllers to interact with main SwitchAccess class.
  *
  * @interface
  */
 function SwitchAccessInterface() {
   /**
    * @type {SwitchAccessPrefs}
    */
   this.switchAccessPrefs = null;
 };
 
 SwitchAccessInterface.prototype = {
   moveToNode: function(doNext) {},
 
-  doDefault: function() {},
+  selectCurrentNode: function() {},
 
   showOptionsPage: function() {},
 
   performedUserAction: function() {},
 
   debugMoveToNext: function() {},
 
   debugMoveToPrevious: function() {},
 
   debugMoveToFirstChild: function() {},
 
   debugMoveToParent: function() {}
 };