Port chromevox build to GN.

chrome/browser/resources/chromeos/chromevox/testing/chromevox_unittest_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.
 
-GEN_INCLUDE([
-    'chrome/browser/resources/chromeos/chromevox/testing/assert_additions.js']);
-GEN_INCLUDE([
-  'chrome/browser/resources/chromeos/chromevox/testing/common.js',
-  'chrome/browser/resources/chromeos/chromevox/testing/callback_helper.js']);
+GEN_INCLUDE(['assert_additions.js']);
+GEN_INCLUDE(['common.js',
+    'callback_helper.js']);
 
 /**
  * Base test fixture for ChromeVox unit tests.
  *
  * Note that while conceptually these are unit tests, these tests need
  * to run in a full web page, so they're actually run as WebUI browser
  * tests.
  *
  * @constructor
  * @extends {testing.Test}
@@ skipping 188 matching lines @@
    * {@code testDone()} will be called when all callbacks have been called.
    * @param {Function=} opt_callback Wrapped callback that will have its this
    *        reference bound to the test fixture.
    * @return {Function}
    */
   newCallback: function(opt_callback) {
     assertNotEquals(null, this.callbackHelper_);
     return this.callbackHelper_.wrap(opt_callback);
   }
 };