Fine tuned availability of hotword plugin.

chrome/browser/resources/options/browser_options.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.
 
 cr.define('options', function() {
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
 
   //
@@ skipping 212 matching lines @@
         this.updateAccountPicture_();
 
         $('account-picture').onclick = this.showImagerPickerOverlay_;
         $('change-picture-caption').onclick = this.showImagerPickerOverlay_;
 
         $('manage-accounts-button').onclick = function(event) {
           OptionsPage.navigateToPage('accounts');
           chrome.send('coreOptionsUserMetricsAction',
               ['Options_ManageAccounts']);
         };
+        $('hotword-app-list').hidden =
+            !loadTimeData.getBoolean('appListHotwordShown');

[Evan Stade, 2014/02/12 23:01:49]

call this shouldShowAppListHotword

[Jun Mukai, 2014/02/13 00:08:31]

Done.

       } else {
         $('import-data').onclick = function(event) {
           ImportDataOverlay.show();
           chrome.send('coreOptionsUserMetricsAction', ['Import_ShowDlg']);
         };
 
         if ($('themes-native-button')) {
           $('themes-native-button').onclick = function(event) {
             chrome.send('themesSetNative');
           };
@@ skipping 1366 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });