Support first letter navigation in Panel.

chrome/browser/resources/chromeos/chromevox/cvox2/background/output.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.
 
 /**
  * @fileoverview Provides output services for ChromeVox.
  */
 
 goog.provide('Output');
 goog.provide('Output.EventType');
@@ skipping 214 matching lines @@
     msgId: 'role_math',
     inherits: 'abstractContainer'
   },
   menu: {
     msgId: 'role_menu'
   },
   menuBar: {
     msgId: 'role_menubar',
   },
   menuItem: {
-    msgId: 'role_menuitem',
-    ignoreAncestry: true
+    msgId: 'role_menuitem'
   },
   menuItemCheckBox: {
-    msgId: 'role_menuitemcheckbox',
-    ignoreAncestry: true
+    msgId: 'role_menuitemcheckbox'
   },
   menuItemRadio: {
-    msgId: 'role_menuitemradio',
-    ignoreAncestry: true
+    msgId: 'role_menuitemradio'
   },
   menuListOption: {
-    msgId: 'role_menuitem',
-    ignoreAncestry: true
+    msgId: 'role_menuitem'
   },
   menuListPopup: {
     msgId: 'role_menu'
   },
   navigation: {
     msgId: 'role_navigation',
     inherits: 'abstractContainer'
   },
   note: {
     msgId: 'role_note',
@@ skipping 1384 matching lines @@
           break;
         }
         earconFinder = earconFinder.parent;
       }
     }
     return null;
   }
 };
 
 });  // goog.scope