Oilpan: move Screen and its supplement to the oilpan heap.

Source/core/frame/DOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 13 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DOMWindow_h
 #define DOMWindow_h
 
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/FrameDestructionObserver.h"
+#include "heap/Handle.h"
 #include "platform/LifecycleContext.h"
 #include "platform/Supplementable.h"
 
 #include "wtf/Forward.h"
 
 namespace WebCore {
     class ApplicationCache;
     class BarProp;
     class CSSRuleList;
     class CSSStyleDeclaration;
@@ skipping 285 matching lines @@
         void clearDocument();
         void resetDOMWindowProperties();
         void willDestroyDocumentInFrame();
 
         RefPtr<Document> m_document;
 
         bool m_shouldPrintWhenFinishedLoading;
 
         HashSet<DOMWindowProperty*> m_properties;
 
-        mutable RefPtr<Screen> m_screen;
+        mutable RefPtrWillBePersistent<Screen> m_screen;
         mutable RefPtr<History> m_history;
         mutable RefPtr<BarProp> m_locationbar;
         mutable RefPtr<BarProp> m_menubar;
         mutable RefPtr<BarProp> m_personalbar;
         mutable RefPtr<BarProp> m_scrollbars;
         mutable RefPtr<BarProp> m_statusbar;
         mutable RefPtr<BarProp> m_toolbar;
         mutable RefPtr<Console> m_console;
         mutable RefPtr<Navigator> m_navigator;
         mutable RefPtr<Location> m_location;
@@ skipping 20 matching lines @@
     }
 
     inline String DOMWindow::defaultStatus() const
     {
         return m_defaultStatus;
     }
 
 } // namespace WebCore
 
 #endif // DOMWindow_h