Move the Widget hierarchy to the Oilpan heap.

Source/core/frame/LocalFrame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 52 matching lines @@
     class TreeScope;
     class VisiblePosition;
 
     class LocalFrame : public Frame, public WillBeHeapSupplementable<LocalFrame>  {
     public:
         static PassRefPtrWillBeRawPtr<LocalFrame> create(FrameLoaderClient*, FrameHost*, FrameOwner*);
 
         virtual bool isLocalFrame() const OVERRIDE { return true; }
 
         void init();
-        void setView(PassRefPtr<FrameView>);
+        void setView(PassRefPtrWillBeRawPtr<FrameView>);
         void createView(const IntSize&, const Color&, bool,
             ScrollbarMode = ScrollbarAuto, bool horizontalLock = false,
             ScrollbarMode = ScrollbarAuto, bool verticalLock = false);
 
         virtual ~LocalFrame();
         virtual void trace(Visitor*) OVERRIDE;
 
         virtual void detach() OVERRIDE;
 
         void addDestructionObserver(FrameDestructionObserver*);
@@ skipping 77 matching lines @@
         LocalFrame(FrameLoaderClient*, FrameHost*, FrameOwner*);
 
         String localLayerTreeAsText(unsigned flags) const;
 
         void detachView();
 
         WillBeHeapHashSet<RawPtrWillBeWeakMember<FrameDestructionObserver> > m_destructionObservers;
         mutable FrameLoader m_loader;
         mutable NavigationScheduler m_navigationScheduler;
 
-        RefPtr<FrameView> m_view;
+        RefPtrWillBeMember<FrameView> m_view;
         // Usually 0. Non-null if this is the top frame of PagePopup.
         RefPtrWillBeMember<Element> m_pagePopupOwner;
 
         OwnPtr<ScriptController> m_script;
         const OwnPtrWillBeMember<Editor> m_editor;
         const OwnPtrWillBeMember<SpellChecker> m_spellChecker;
         const OwnPtrWillBeMember<FrameSelection> m_selection;
         const OwnPtrWillBeMember<EventHandler> m_eventHandler;
         const OwnPtrWillBeMember<FrameConsole> m_console;
         OwnPtrWillBeMember<InputMethodController> m_inputMethodController;
@@ skipping 73 matching lines @@
     DEFINE_TYPE_CASTS(LocalFrame, Frame, localFrame, localFrame->isLocalFrame(), localFrame.isLocalFrame());
 
 } // namespace blink
 
 // During refactoring, there are some places where we need to do type conversions that
 // will not be needed once all instances of LocalFrame and RemoteFrame are sorted out.
 // At that time this #define will be removed and all the uses of it will need to be corrected.
 #define toLocalFrameTemporary toLocalFrame
 
 #endif // LocalFrame_h