Revert of Make ChromeVox Next a setting in options page.

chrome/browser/resources/chromeos/chromevox/testing/chromevox_next_e2e_test_base.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.
 
 // Include test fixture.
 GEN_INCLUDE(['chromevox_e2e_test_base.js']);
 
 /**
  * Base test fixture for ChromeVox Next end to end tests.
  *
@@ skipping 39 matching lines @@
   runWithLoadedTree: function(doc, callback, opt_url) {
     callback = this.newCallback(callback);
     chrome.automation.getDesktop(function(r) {
       var url = opt_url || TestUtils.createUrlForDoc(doc);
       var listener = function(evt) {
         if (evt.target.root.url != url)
           return;
 
         r.removeEventListener('focus', listener, true);
         r.removeEventListener('loadComplete', listener, true);
-        ChromeVoxState.instance.onGotCommand('nextObject');
+        global.backgroundObj.onGotCommand('nextObject');
         callback && callback(evt.target);
         callback = null;
       };
       r.addEventListener('focus', listener, true);
       r.addEventListener('loadComplete', listener, true);
       var createParams = {
         active: true,
         url: url
       };
       chrome.tabs.create(createParams);
     }.bind(this));
   },
 
   listenOnce: function(node, eventType, callback, capture) {
     var innerCallback = this.newCallback(function() {
       node.removeEventListener(eventType, innerCallback, capture);
       callback.apply(this, arguments);
     });
     node.addEventListener(eventType, innerCallback, capture);
   }
 };