Issue 4613 - fix leak of Thread

src/GlobalJsObject.cpp

 /*
  * 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 19 matching lines @@
 #include "Utils.h"
 
 using namespace AdblockPlus;
 
 namespace
 {
   class TimeoutThread : public Thread
   {
   public:
     TimeoutThread(JsValueList& arguments)
+      : Thread(true)
     {
       if (arguments.size() < 2)
         throw std::runtime_error("setTimeout requires at least 2 parameters");
 
       if (!arguments[0]->IsFunction())
         throw std::runtime_error(
           "First argument to setTimeout must be a function");
 
       function = arguments[0];
       delay = arguments[1]->AsInt();
@@ skipping 62 matching lines @@
   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;
 }