Issue 5378 - Stop using of jshydra in libadblockplus

lib/updater.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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 31 matching lines @@
   }
   let url = updateUrl.replace(/%TYPE%/g, forceCheck ? TYPE_MANUAL : TYPE_AUTOMATIC);
   let downloadable = new Downloadable(url);
   downloadable.lastError = Prefs.update_last_error;
   downloadable.lastCheck = Prefs.update_last_check;
   downloadable.softExpiration = Prefs.update_soft_expiration;
   downloadable.hardExpiration = Prefs.update_hard_expiration;
   return downloadable;
 }
 
-function getDownloadables()
+function* getDownloadables()
 {
   yield getDownloadable(false);
 }
 
 function onExpirationChange(downloadable)
 {
   Prefs.update_last_check = downloadable.lastCheck;
   Prefs.update_soft_expiration = downloadable.softExpiration;
   Prefs.update_hard_expiration = downloadable.hardExpiration;
 }
@@ skipping 37 matching lines @@
   if (callback)
     callback(error);
   callback = null;
 }
 
 let checkForUpdates = exports.checkForUpdates = function checkForUpdates(_callback)
 {
   callback = _callback;
   downloader.download(getDownloadable(true));
 }