Issue 301 - Change for each to for .. of .. in lib/

lib/downloader.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 102 matching lines @@
    * @type Function
    */
   onDownloadError: null,
 
   /**
    * Checks whether anything needs downloading.
    */
   _doCheck: function()
   {
     let now = Date.now();
-    for each (let downloadable in this.dataSource())
+    for (let downloadable of this.dataSource())
     {
       if (downloadable.lastCheck && now - downloadable.lastCheck > this.maxAbsenceInterval)
       {
         // No checks for a long time interval - user must have been offline, e.g.
         // during a weekend. Increase soft expiration to prevent load peaks on the
         // server.
         downloadable.softExpiration += now - downloadable.lastCheck;
       }
       downloadable.lastCheck = now;
 
@@ skipping 238 matching lines @@
    * @type Integer
    */
   softExpiration: 0,
 
   /**
    * Hard expiration interval, this is fixed.
    * @type Integer
    */
   hardExpiration: 0,
 };