[NOT READY FOR REVIEW YET]workers: Some refactoring to allow creating new kind of worker threads

Source/core/workers/WorkerGlobalScope.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009, 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 64 matching lines @@
         // Notify parent that this context is closed. Parent is responsible for calling WorkerThread::stop().
         workerGlobalScope->thread()->workerReportingProxy().workerGlobalScopeClosed();
     }
 
     virtual bool isCleanupTask() const { return true; }
 };
 
 WorkerGlobalScope::WorkerGlobalScope(const KURL& url, const String& userAgent, WorkerThread* thread, double timeOrigin, const SecurityOrigin* starterOrigin, PassOwnPtrWillBeRawPtr<WorkerClients> workerClients)
     : m_url(url)
     , m_userAgent(userAgent)
-    , m_script(adoptPtr(new WorkerScriptController(*this)))
+    , m_script(adoptPtr(new WorkerScriptController(*this, thread->isolate())))
     , m_thread(thread)
     , m_workerInspectorController(adoptRefWillBeNoop(new WorkerInspectorController(this)))
     , m_closing(false)
     , m_eventQueue(WorkerEventQueue::create(this))
     , m_workerClients(workerClients)
     , m_timeOrigin(timeOrigin)
     , m_messageStorage(ConsoleMessageStorage::createForWorker(this))
     , m_workerExceptionUniqueIdentifier(0)
 {
     setSecurityOrigin(SecurityOrigin::create(url));
@@ skipping 265 matching lines @@
     visitor->trace(m_timers);
     visitor->trace(m_messageStorage);
     visitor->trace(m_pendingMessages);
     HeapSupplementable<WorkerGlobalScope>::trace(visitor);
 #endif
     ExecutionContext::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink