Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/core/workers/DedicatedWorkerGlobalScope.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DedicatedWorkerGlobalScope_h
 #define DedicatedWorkerGlobalScope_h
 
 #include "core/dom/MessagePort.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/workers/WorkerGlobalScope.h"
+#include "heap/Handle.h"
 
 namespace WebCore {
 
 class DedicatedWorkerThread;
 struct WorkerThreadStartupData;
 
 class DedicatedWorkerGlobalScope FINAL : public WorkerGlobalScope {
 public:
     typedef WorkerGlobalScope Base;
-    static PassRefPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtr<WorkerThreadStartupData>, double timeOrigin);
+    static PassRefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtr<WorkerThreadStartupData>, double timeOrigin);
     virtual ~DedicatedWorkerGlobalScope();
 
     virtual bool isDedicatedWorkerGlobalScope() const OVERRIDE { return true; }
 
     // Overridden to allow us to check our pending activity after executing imported script.
     virtual void importScripts(const Vector<String>& urls, ExceptionState&) OVERRIDE;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     void postMessage(PassRefPtr<SerializedScriptValue>, const MessagePortArray*, ExceptionState&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
 
     DedicatedWorkerThread* thread();
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     DedicatedWorkerGlobalScope(const KURL&, const String& userAgent, DedicatedWorkerThread*, double timeOrigin, PassOwnPtr<WorkerClients>);
 };
 
 } // namespace WebCore
 
 #endif // DedicatedWorkerGlobalScope_h