[oilpan] Move EventHandler to the heap

Source/core/page/Frame.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 79 matching lines @@
         void detachFromPage();
         void disconnectOwnerElement();
 
         Page* page() const;
         RESULT(HTMLFrameOwnerElement) ownerElement() const;
 
         RESULT(Document) document() const;
         FrameView* view() const;
 
         Editor* editor() const;
-        EventHandler* eventHandler() const;
+        RESULT(EventHandler) eventHandler() const;
         FrameLoader* loader() const;
         NavigationScheduler* navigationScheduler() const;
         FrameSelection* selection() const;
         FrameTree* tree() const;
         AnimationController* animation() const;
         ScriptController* script();
         
         RenderView* contentRenderer() const; // Root of the render tree for the document contained in this frame.
         RenderPart* ownerRenderer() const; // Renderer for the element that contains this frame.
 
@@ skipping 69 matching lines @@
         mutable NavigationScheduler m_navigationScheduler;
 
         // FIXME(oilpan): This should be a strong pointer.
         HTMLFrameOwnerElement* m_ownerElement;
         RefPtr<FrameView> m_view;
         ANNOTATED_FIELD(Persistent<Document>, m_doc);
 
         OwnPtr<ScriptController> m_script;
         OwnPtr<Editor> m_editor;
         OwnPtr<FrameSelection> m_selection;
-        OwnPtr<EventHandler> m_eventHandler;
+        ANNOTATED_FIELD(Persistent<EventHandler>, m_eventHandler);
         OwnPtr<AnimationController> m_animationController;
 
         float m_pageZoomFactor;
         float m_textZoomFactor;
 
 #if ENABLE(ORIENTATION_EVENTS)
         int m_orientation;
 #endif
 
         bool m_inViewSourceMode;
@@ skipping 62 matching lines @@
     inline Page* Frame::page() const
     {
         return m_page;
     }
 
     inline void Frame::detachFromPage()
     {
         m_page = 0;
     }
 
-    inline EventHandler* Frame::eventHandler() const
+    inline RESULT(EventHandler) Frame::eventHandler() const
     {
-        return m_eventHandler.get();
+        return m_eventHandler;
     }
 
 } // namespace WebCore
 
 #endif // Frame_h