Move FrameDestructionObserver into LocalFrame.

Source/core/frame/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 13 matching lines @@
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef Frame_h
 #define Frame_h
 
 #include "core/page/FrameTree.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/HashSet.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 class WebLayer;
 }
 
 namespace blink {
 
 class ChromeClient;
 class FrameClient;
-class FrameDestructionObserver;
 class FrameHost;
 class FrameOwner;
 class HTMLFrameOwnerElement;
 class LocalDOMWindow;
 class Page;
 class RenderPart;
 class Settings;
 
 class Frame : public RefCounted<Frame> {
 public:
     virtual bool isLocalFrame() const { return false; }
     virtual bool isRemoteFrame() const { return false; }
 
     virtual ~Frame();
 
-    void addDestructionObserver(FrameDestructionObserver*);
-    void removeDestructionObserver(FrameDestructionObserver*);
-
-    virtual void willDetachFrameHost();
-    virtual void detachFromFrameHost();
-
     FrameClient* client() const;
     void clearClient();
 
     // NOTE: Page is moving out of Blink up into the browser process as
     // part of the site-isolation (out of process iframes) work.
     // FrameHost should be used instead where possible.
     Page* page() const;
     FrameHost* host() const; // Null when the frame is detached.
 
     bool isMainFrame() const;
@@ skipping 31 matching lines @@
 
     mutable FrameTree m_treeNode;
 
     FrameHost* m_host;
     FrameOwner* m_owner;
 
     RefPtrWillBePersistent<LocalDOMWindow> m_domWindow;
 
 private:
     FrameClient* m_client;
-    HashSet<FrameDestructionObserver*> m_destructionObservers;
-
     blink::WebLayer* m_remotePlatformLayer;
 };
 
 inline FrameClient* Frame::client() const
 {
     return m_client;
 }
 
 inline void Frame::clearClient()
 {
@@ skipping 14 matching lines @@
 {
     return m_treeNode;
 }
 
 // Allow equality comparisons of Frames by reference or pointer, interchangeably.
 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES_REFCOUNTED(Frame)
 
 } // namespace blink
 
 #endif // Frame_h