Rename ChromeVox tests and utilities for consistency.

chrome/browser/resources/chromeos/chromevox2/cvox2/background/background.extjs

 // 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/testing/chromevox_e2e_test.js']);
+GEN_INCLUDE(['../../../chromevox/testing/chromevox_e2e_test_base.js']);
 
 /**
  * Test fixture for cvox2.Background.
  * @constructor
  * @extends {ChromeVoxE2ETest}
  */
 function BackgroundTest() {}
 
 BackgroundTest.prototype = {
   __proto__: ChromeVoxE2ETest.prototype,
@@ skipping 67 matching lines @@
     testButton.addEventListener(chrome.automation.EventType.focus,
         function(e) {
           var result =
               cvox.ChromeVox.tts.checkIfTextWasSpoken('Status tray button');
           testDone([result, '']);
         },
         true);
     testButton.focus();
   });
 });