Implement update notifications for ChromeVox Next.

chrome/browser/resources/chromeos/chromevox/common/command_store_test.unitjs

 // 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.
 
 // Include test fixture.
 GEN_INCLUDE(['../testing/chromevox_unittest_base.js']);
 
 /**
  * Test fixture.
  * @constructor
  * @extends {ChromeVoxUnitTestBase}
  */
 function CvoxCommandStoreUnitTest() {}
 
 CvoxCommandStoreUnitTest.prototype = {
   __proto__: ChromeVoxUnitTestBase.prototype,
 
   /** @override */
   closureModuleDeps: [
     'cvox.ChromeVoxUserCommands',
     'cvox.CommandStore',
   ]
 };
 
 TEST_F('CvoxCommandStoreUnitTest', 'TableData', function() {
   var categories = cvox.CommandStore.categories();
   assertEquals(10, categories.length);
   assertEquals('modifier_keys', categories[0]);
   assertEquals('controlling_speech', categories[1]);
-  assertEquals('navigation', categories[2]);
-  assertEquals('information', categories[3]);
-  assertEquals('help_commands', categories[4]);
+  assertEquals('help_commands', categories[2]);
+  assertEquals('navigation', categories[3]);
+  assertEquals('information', categories[4]);
   assertEquals('overview', categories[5]);
   assertEquals('jump_commands', categories[6]);
   assertEquals('tables', categories[7]);
 
   assertEquals('stop_speech_key',
                cvox.CommandStore.messageForCommand('stopSpeech'));
   assertEquals('controlling_speech',
                cvox.CommandStore.categoryForCommand('stopSpeech'));
 
   var controllingSpeechCmds =
@@ skipping 20 matching lines @@
   var categories = cvox.CommandStore.categories();
   for (var i = 0; i < categories.length; i++) {
     var commands = cvox.CommandStore.commandsForCategory(categories[i]);
     for (j = 0; j < commands.length; j++) {
       var command = commands[j];
       assertEquals(command + ' function',
           command + ' ' + typeof(cvox.ChromeVoxUserCommands.commands[command]));
     }
   }
 });