Compile chrome://settings, part 6

chrome/browser/resources/options/chromeos/keyboard_overlay.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() {
 
   /**
    * Auto-repeat delays (in ms) for the corresponding slider values, from
    * long to short. The values were chosen to provide a large range while giving
    * several options near the defaults.
@@ skipping 15 matching lines @@
 
   /**
    * Encapsulated handling of the keyboard overlay.
    * @constructor
    * @extends {options.SettingsDialog}
    */
   function KeyboardOverlay() {
     options.SettingsDialog.call(this, 'keyboard-overlay',
         loadTimeData.getString('keyboardOverlayTabTitle'),
         'keyboard-overlay',
-        $('keyboard-confirm'), $('keyboard-cancel'));
+        assertInstanceof($('keyboard-confirm'), HTMLButtonElement),
+        assertInstanceof($('keyboard-cancel'), HTMLButtonElement));
   }
 
   cr.addSingletonGetter(KeyboardOverlay);
 
   KeyboardOverlay.prototype = {
     __proto__: options.SettingsDialog.prototype,
 
     /** @override */
     initializePage: function() {
       options.SettingsDialog.prototype.initializePage.call(this);
@@ skipping 117 matching lines @@
   cr.makePublic(KeyboardOverlay, [
     'showCapsLockOptions',
     'showDiamondKeyOptions',
   ]);
 
   // Export
   return {
     KeyboardOverlay: KeyboardOverlay
   };
 });