bluetooth: Add tests for Sidebar in bluetooth internals browser test suite.

chrome/browser/resources/bluetooth_internals/bluetooth_internals.js

 // Copyright 2016 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.
 
 /**
  * Javascript for bluetooth_internals.html, served from
  *     chrome://bluetooth-internals/.
  */
 
 // Expose for testing.
 var adapterBroker = null;
 var devices = null;
+var sidebarObj = null;
 
 cr.define('bluetooth_internals', function() {
   /** @const */ var DevicesPage = devices_page.DevicesPage;
   /** @const */ var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * Observer for page changes. Used to update page title header.
    * @extends {cr.ui.pageManager.PageManager.Observer}
    */
   var PageObserver = function() {};
@@ skipping 79 matching lines @@
       }).catch(function(error) {
         devices.updateConnectionStatus(
             address,
             device_collection.ConnectionStatus.DISCONNECTED,
             error);
       });
     });
   }
 
   function setupPages() {
-    var sidebar = new window.sidebar.Sidebar($('sidebar'));
-    $('menu-btn').addEventListener('click', function() { sidebar.open(); });
-    PageManager.addObserver(sidebar);
+    sidebarObj = new window.sidebar.Sidebar($('sidebar'));
+    $('menu-btn').addEventListener('click', function() { sidebarObj.open(); });
+    PageManager.addObserver(sidebarObj);
     PageManager.addObserver(new PageObserver());
 
     devicesPage = new DevicesPage();
     PageManager.register(devicesPage);
 
     // Set up hash-based navigation.
     window.addEventListener('hashchange', function() {
       PageManager.showPageByName(window.location.hash.substr(1));
     });
 
@@ skipping 17 matching lines @@
       .catch(function(error) { console.error(error); });
   }
 
   return {
     initializeViews: initializeViews
   };
 });
 
 document.addEventListener(
     'DOMContentLoaded', bluetooth_internals.initializeViews);