Move FrameDestructionObserver into LocalFrame.

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 17 matching lines @@
 #ifndef LocalFrame_h
 #define LocalFrame_h
 
 #include "core/frame/Frame.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/NavigationScheduler.h"
 #include "core/page/FrameTree.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollTypes.h"
+#include "wtf/HashSet.h"
 
 namespace blink {
 
     class Color;
     class Document;
     class DragImage;
     class Editor;
     class EventHandler;
     class FetchContext;
     class FloatSize;
     class FloatRect;
     class FrameConsole;
+    class FrameDestructionObserver;
     class FrameSelection;
     class FrameView;
     class InputMethodController;
     class IntPoint;
     class IntSize;
     class Node;
     class Range;
     class RenderView;
     class TreeScope;
     class ScriptController;
     class SpellChecker;
     class TreeScope;
     class VisiblePosition;
 
     class LocalFrame : public Frame, public WillBePersistentHeapSupplementable<LocalFrame>  {
     public:
         static PassRefPtr<LocalFrame> create(FrameLoaderClient*, FrameHost*, FrameOwner*);
 
         virtual bool isLocalFrame() const OVERRIDE { return true; }
 
         void init();
         void setView(PassRefPtr<FrameView>);
         void createView(const IntSize&, const Color&, bool,
             ScrollbarMode = ScrollbarAuto, bool horizontalLock = false,
             ScrollbarMode = ScrollbarAuto, bool verticalLock = false);
 
         virtual ~LocalFrame();
 
-        virtual void willDetachFrameHost() OVERRIDE;
-        virtual void detachFromFrameHost() OVERRIDE;
+        void addDestructionObserver(FrameDestructionObserver*);
+        void removeDestructionObserver(FrameDestructionObserver*);
+
+        void willDetachFrameHost();
+        void detachFromFrameHost();
 
         virtual void disconnectOwnerElement() OVERRIDE;
 
         virtual void setDOMWindow(PassRefPtrWillBeRawPtr<LocalDOMWindow>) OVERRIDE;
         FrameView* view() const;
         Document* document() const;
 
         RenderView* contentRenderer() const; // Root of the render tree for the document contained in this frame.
 
         Editor& editor() const;
@@ skipping 53 matching lines @@
 
         bool isURLAllowed(const KURL&) const;
 
     // ========
 
     private:
         LocalFrame(FrameLoaderClient*, FrameHost*, FrameOwner*);
 
         String localLayerTreeAsText(unsigned flags) const;
 
+        HashSet<FrameDestructionObserver*> m_destructionObservers;
         mutable FrameLoader m_loader;
         mutable NavigationScheduler m_navigationScheduler;
 
         RefPtr<FrameView> m_view;
 
         OwnPtr<ScriptController> m_script;
         const OwnPtrWillBePersistent<Editor> m_editor;
         const OwnPtr<SpellChecker> m_spellChecker;
         const OwnPtrWillBePersistent<FrameSelection> m_selection;
         const OwnPtrWillBePersistent<EventHandler> m_eventHandler;
@@ skipping 75 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