Compile chrome://settings, part 6

chrome/browser/resources/options/chromeos/third_party_ime_confirm_overlay.js

 // 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.
 
 cr.define('options', function() {
   /** @const */ var PageManager = cr.ui.pageManager.PageManager;
   /** @const */ var SettingsDialog = options.SettingsDialog;
 
   /**
    * HomePageOverlay class
    * Dialog that allows users to set the home page.
    * @constructor
    * @extends {options.SettingsDialog}
    */
   function ThirdPartyImeConfirmOverlay() {
     SettingsDialog.call(
         this, 'thirdPartyImeConfirm',
         loadTimeData.getString('thirdPartyImeConfirmOverlayTabTitle'),
         'third-party-ime-confirm-overlay',
-        $('third-party-ime-confirm-ok'),
-        $('third-party-ime-confirm-cancel'));
+        assertInstanceof($('third-party-ime-confirm-ok'), HTMLButtonElement),
+        assertInstanceof($('third-party-ime-confirm-cancel'),
+                         HTMLButtonElement));
   }
 
   cr.addSingletonGetter(ThirdPartyImeConfirmOverlay);
 
   ThirdPartyImeConfirmOverlay.prototype = {
     __proto__: SettingsDialog.prototype,
 
    /**
     * Callback to authorize use of an input method.
     * @type {Function}
@@ skipping 49 matching lines @@
    */
   ThirdPartyImeConfirmOverlay.showConfirmationDialog = function(data) {
     ThirdPartyImeConfirmOverlay.getInstance().showConfirmationDialog_(data);
   };
 
   // Export
   return {
     ThirdPartyImeConfirmOverlay: ThirdPartyImeConfirmOverlay
   };
 });