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 859 matching lines @@
           this.showSectionWithAnimation_(section, container);
         else
           this.hideSectionWithAnimation_(section, container);
       } else {
         section.hidden = !event.value.value;
         this.onShowHomeButtonChangedCalled_ = true;
       }
     },
 
     /**
+     * Activates the option about the hotword in the app-list.
+     * @private
+     */
+    showAppListHotword_: function() {
+      $('hotword-app-list').hidden = false;
+    },
+
+    /**
      * Activates the Hotword section from the System settings page.
      * @private
      */
     showHotwordSection_: function() {
       $('hotword-search').hidden = false;
     },
 
     /**
      * Event listener for the 'homepage is NTP' preference. Updates the label
      * next to the 'Change' button.
@@ skipping 684 matching lines @@
     'setSpokenFeedbackCheckboxState',
     'setThemesResetButtonEnabled',
     'setVirtualKeyboardCheckboxState',
     'setupCloudPrintConnectorSection',
     'setupPageZoomSelector',
     'setupProxySettingsSection',
     'showBluetoothSettings',
     'showCreateProfileError',
     'showCreateProfileSuccess',
     'showCreateProfileWarning',
+    'showAppListHotword',
     'showHotwordSection',
     'showManagedUserImportError',
     'showManagedUserImportSuccess',
     'showMouseControls',
     'showTouchpadControls',
     'updateAccountPicture',
     'updateAutoLaunchState',
     'updateDefaultBrowserState',
     'updateManagesSupervisedUsers',
     'updateSearchEngines',
@@ skipping 15 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });