[Hotword] Putting preferences under search for hotword service. Putting behind a flag.

chrome/browser/ui/webui/options/settings_app_browsertest.js

 // Copyright 2013 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.
 
 /**
  * TestFixture for App Launcher's Settings App testing.
  * @extends {testing.Test}
  * @constructor
  */
 function SettingsAppWebUITest() {}
@@ skipping 18 matching lines @@
     var elem = $(elementId);
     return elem.offsetWidth > 0 || elem.offsetHeight > 0;
   }
   assertTrue(OptionsPage.isSettingsApp());
   assertTrue(isVisible('sync-users-section'));
   assertTrue(isVisible('sync-section'));
 
   // Spot-check some regular settings items that should be hidden.
   assertFalse(isVisible('change-home-page-section'));
   assertFalse(isVisible('default-search-engine'));
+  assertFalse(isVisible('hotword-settings-section'));
   assertFalse(isVisible('privacy-section'));
   assertFalse(isVisible('startup-section'));
 });
 
 // Check functionality of LoadTimeData.overrideValues(), which the Settings App
 // uses. Do spot checks, so the test is not too fragile. Some of the content
 // strings rely on waiting for sync sign-in status, or platform-specifics.
 TEST_F('SettingsAppWebUITest', 'testStrings', function() {
   // Ensure we check against the override values.
   assertTrue(!!loadTimeData.getValue('settingsApp'));
 
   // Check a product-specific label, to ensure it uses "App Launcher", and not
   // Chrome / Chromium.
   var languagesLabelElement =
       document.querySelector('[i18n-content="languageSectionLabel"]');
   assertNotEquals(-1, languagesLabelElement.innerHTML.indexOf('App Launcher'));
 });
 
 GEN('#endif  // defined(ENABLE_SETTINGS_APP)');