Wire up an api to darken screen for accessibility

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.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.
 
 /**
  * @fileoverview The entry point for all ChromeVox2 related code for the
  * background page.
  */
 
 goog.provide('Background');
 
 goog.require('AutomationPredicate');
 goog.require('AutomationUtil');
 goog.require('BackgroundKeyboardHandler');
 goog.require('BrailleCommandHandler');
 goog.require('ChromeVoxState');
 goog.require('CommandHandler');
 goog.require('FindHandler');
 goog.require('LiveRegions');
 goog.require('MediaAutomationHandler');
 goog.require('NextEarcons');
 goog.require('Notifications');
 goog.require('Output');
 goog.require('Output.EventType');
 goog.require('PanelCommand');
-goog.require('Stubs');
 goog.require('constants');
 goog.require('cursors.Cursor');
 goog.require('cvox.BrailleKeyCommand');
 goog.require('cvox.ChromeVoxBackground');
 goog.require('cvox.ChromeVoxEditableTextBase');
 goog.require('cvox.ClassicEarcons');
 goog.require('cvox.ExtensionBridge');
 goog.require('cvox.NavBraille');
 
 goog.scope(function() {
@@ skipping 781 matching lines @@
   return new RegExp('^(' + globs.map(function(glob) {
     return glob.replace(/[.+^$(){}|[\]\\]/g, '\\$&')
         .replace(/\*/g, '.*')
         .replace(/\?/g, '.');
   }).join('|') + ')$');
 };
 
 new Background();
 
 });  // goog.scope