Update WebUI calls to use extensions namespace, update IDs in c/b/r/extensions

chrome/browser/resources/extensions/chromeos/kiosk_app_disable_bailout_confirm.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.
 
 cr.define('extensions', function() {
   /**
    * A confirmation overlay for disabling kiosk app bailout shortcut.
    * @constructor
    */
   function KioskDisableBailoutConfirm() {
   }
 
   cr.addSingletonGetter(KioskDisableBailoutConfirm);
 
   KioskDisableBailoutConfirm.prototype = {
     /**
      * Initialize the page.
      */
     initialize: function() {
       var overlay = $('kiosk-disable-bailout-confirm-overlay');
       cr.ui.overlay.setupOverlay(overlay);
       cr.ui.overlay.globalInitialization();
       overlay.addEventListener('cancelOverlay', this.handleCancel);
 
       var el = $('kiosk-disable-bailout-shortcut');
       el.addEventListener('change', this.handleDisableBailoutShortcutChange_);
 
       $('kiosk-disable-bailout-confirm-button').onclick = function(e) {
-        ExtensionSettings.showOverlay($('kiosk-apps-page'));
+        extensions.ExtensionSettings.showOverlay($('kiosk-apps-page'));
         chrome.send('setDisableBailoutShortcut', [true]);
       };
       $('kiosk-disable-bailout-cancel-button').onclick = this.handleCancel;
     },
 
     /** Handles overlay being canceled. */
     handleCancel: function() {
-      ExtensionSettings.showOverlay($('kiosk-apps-page'));
+      extensions.ExtensionSettings.showOverlay($('kiosk-apps-page'));
       $('kiosk-disable-bailout-shortcut').checked = false;
     },
 
     /**
      * Custom change handler for the disable bailout shortcut checkbox.
      * It blocks the underlying pref being changed and brings up confirmation
      * alert to user.
      * @private
      */
     handleDisableBailoutShortcutChange_: function() {
       // Just set the pref if user un-checks the box.
       if (!$('kiosk-disable-bailout-shortcut').checked) {
         chrome.send('setDisableBailoutShortcut', [false]);
         return false;
       }
 
       // Otherwise, show the confirmation overlay.
-      ExtensionSettings.showOverlay($('kiosk-disable-bailout-confirm-overlay'));
+      extensions.ExtensionSettings.showOverlay($(
+          'kiosk-disable-bailout-confirm-overlay'));
       return true;
     }
   };
 
   // Export
   return {
     KioskDisableBailoutConfirm: KioskDisableBailoutConfirm
   };
 });