Issue 3499 - Create a clean messaging API for internal use

lib/child/bootstrap.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 70 matching lines @@
     loader = Loader({
       paths: {
         "": info.addonRoot + "lib/"
       },
       globals: {
         Components, Cc, Ci, Cu, Cr, atob, btoa, onShutdown,
         addMessageListener, removeMessageListener,
         sendAsyncMessage: sendAsyncMessageWithResponse,
         sendSyncMessage: sendSyncMessageSingleResponse
       },
-      modules: {"info": info},
+      modules: {"info": info, "messageManager": this},
       id: info.addonID
     });
     onShutdown.add(() => unload(loader, "disable"))
 
     main(loader, "child/main");
   }
 
   function shutdown(message)
   {
     if (message.data == Components.stack.filename)
@@ skipping 15 matching lines @@
   }
 
   sendAsyncMessageWithResponse("AdblockPlus:GetInfo", null, init);
   addMessageListener("AdblockPlus:Response", onResponse);
   addMessageListener("AdblockPlus:Shutdown", shutdown);
   onShutdown.add(() => {
     removeMessageListener("AdblockPlus:Response", onResponse);
     removeMessageListener("AdblockPlus:Shutdown", shutdown);
   });
 })();