Issue #3594 - Remove `globalJsObject` and add `GetGlobalObject()`

src/JsContext.h

 /*
  * 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 10 matching lines @@
 #include <v8.h>
 #include <AdblockPlus/JsEngine.h>
 
 namespace AdblockPlus
 {
   class JsContext
   {
   public:
     explicit JsContext(const JsEnginePtr jsEngine);
 
+    v8::Local<v8::Context> GetV8Context() const
+    {
+      return context;
+    }
+
   private:
     const v8::Locker locker;
     const v8::Isolate::Scope isolateScope;
     const v8::HandleScope handleScope;
+    const v8::Local<v8::Context> context;
     const v8::Context::Scope contextScope;
   };
 }
 
 #endif