[Hotword] Remove unneeded preferences. Cleaning up look of settings.

chrome/browser/resources/options/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.
 
 var AddLanguageOverlay = options.AddLanguageOverlay;
 var AlertOverlay = options.AlertOverlay;
 var AutofillEditAddressOverlay = options.AutofillEditAddressOverlay;
 var AutofillEditCreditCardOverlay = options.AutofillEditCreditCardOverlay;
 var AutofillOptions = options.AutofillOptions;
 var BrowserOptions = options.BrowserOptions;
@@ skipping 86 matching lines @@
         new ConfirmDialog(
             'spellingConfirm',
             loadTimeData.getString('spellingConfirmOverlayTabTitle'),
             'spelling-confirm-overlay',
             $('spelling-confirm-ok'),
             $('spelling-confirm-cancel'),
             $('spelling-enabled-control').pref,
             $('spelling-enabled-control').metric),
         BrowserOptions.getInstance());
   }
+  OptionsPage.registerOverlay(
+      new ConfirmDialog(
+          'hotwordConfirm',
+          loadTimeData.getString('hotwordConfirmOverlayTabTitle'),
+          'hotword-confirm-overlay',
+          $('hotword-confirm-ok'),
+          $('hotword-confirm-cancel'),
+          $('hotword-search-enable').pref,
+          $('hotword-search-enable').metric),
+      BrowserOptions.getInstance());
   OptionsPage.registerOverlay(ContentSettings.getInstance(),
                               BrowserOptions.getInstance(),
                               [$('privacyContentSettingsButton')]);
   OptionsPage.registerOverlay(ContentSettingsExceptionsArea.getInstance(),
                               ContentSettings.getInstance());
   OptionsPage.registerOverlay(CookiesView.getInstance(),
                               ContentSettings.getInstance(),
                               [$('privacyContentSettingsButton'),
                                $('show-cookies-button')]);
   OptionsPage.registerOverlay(CreateProfileOverlay.getInstance(),
@@ skipping 133 matching lines @@
   options.OptionsPage.willClose();
 };
 
 /**
  * Listener for the |popstate| event.
  * @param {Event} e The |popstate| event.
  */
 window.onpopstate = function(e) {
   options.OptionsPage.setState(e.state);
 };