Made sure FilterEngine instances are always initialized

src/GlobalJsObject.cpp

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 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 66 matching lines @@
     {
       return v8::ThrowException(v8::String::New(e.what()));
     }
     timeoutThread->Start();
 
     // We should actually return the timer ID here, which could be
     // used via clearTimeout(). But since we don't seem to need
     // clearTimeout(), we can save that for later.
     return v8::Undefined();
   }
+
+  v8::Handle<v8::Value> InitDoneCallback(const v8::Arguments& arguments)
+  {
+    AdblockPlus::JsEngine::FromArguments(arguments)->InitDone();
+    return v8::Undefined();
+  }
 }
 
 JsValuePtr GlobalJsObject::Setup(JsEnginePtr jsEngine, const AppInfo& appInfo,
     JsValuePtr obj)
 {
   obj->SetProperty("setTimeout", jsEngine->NewCallback(::SetTimeoutCallback));
+  obj->SetProperty("_initDone", jsEngine->NewCallback(::InitDoneCallback));
   obj->SetProperty("_fileSystem",
       FileSystemJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("_webRequest",
       WebRequestJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("console",
       ConsoleJsObject::Setup(jsEngine, jsEngine->NewObject()));
   obj->SetProperty("_appInfo",
       AppInfoJsObject::Setup(jsEngine, appInfo, jsEngine->NewObject()));
   return obj;
 }