Invert the owning relationship between WebFrame and Frame.

Source/web/FrameLoaderClientImpl.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 34 matching lines @@
 
 class FrameLoaderClientImpl : public WebCore::FrameLoaderClient {
 public:
     FrameLoaderClientImpl(WebFrameImpl* webFrame);
     ~FrameLoaderClientImpl();
 
     WebFrameImpl* webFrame() const { return m_webFrame; }
 
     // WebCore::FrameLoaderClient ----------------------------------------------
 
-    virtual void frameLoaderDestroyed();
-
     // Notifies the WebView delegate that the JS window object has been cleared,
     // giving it a chance to bind native objects to the window before script
     // parsing begins.
     virtual void dispatchDidClearWindowObjectInWorld(WebCore::DOMWrapperWorld*);
     virtual void documentElementAvailable();
 
     // Script in the page tried to allocate too much memory.
     virtual void didExhaustMemoryAvailableForScript();
 
     virtual void didCreateScriptContext(v8::Handle<v8::Context>, int extensionGroup, int worldId);
     virtual void willReleaseScriptContext(v8::Handle<v8::Context>, int worldId);
 
     // Returns true if we should allow the given V8 extension to be added to
     // the script context at the currently loading page and given extension group.
     virtual bool allowScriptExtension(const String& extensionName, int extensionGroup, int worldId);
 
     virtual bool hasWebView() const;
     virtual bool hasFrameView() const;
+    virtual void willDetachParent();
     virtual void detachedFromParent();
     virtual void dispatchWillRequestAfterPreconnect(WebCore::ResourceRequest&);
     virtual void dispatchWillSendRequest(WebCore::DocumentLoader*, unsigned long identifier, WebCore::ResourceRequest&, const WebCore::ResourceResponse& redirectResponse);
     virtual void dispatchDidReceiveResponse(WebCore::DocumentLoader*, unsigned long identifier, const WebCore::ResourceResponse&);
     virtual void dispatchDidChangeResourcePriority(unsigned long identifier, WebCore::ResourceLoadPriority);
     virtual void dispatchDidFinishLoading(WebCore::DocumentLoader*, unsigned long identifier);
     virtual void dispatchDidLoadResourceFromMemoryCache(const WebCore::ResourceRequest&, const WebCore::ResourceResponse&);
     virtual void dispatchDidHandleOnloadEvents();
     virtual void dispatchDidReceiveServerRedirectForProvisionalLoad();
     virtual void dispatchDidNavigateWithinPage(WebCore::HistoryItem*, WebCore::HistoryCommitType);
@@ skipping 80 matching lines @@
     // The WebFrame that owns this object and manages its lifetime. Therefore,
     // the web frame object is guaranteed to exist.
     WebFrameImpl* m_webFrame;
 };
 
 DEFINE_TYPE_CASTS(FrameLoaderClientImpl, WebCore::FrameLoaderClient, client, client->isFrameLoaderClientImpl(), client.isFrameLoaderClientImpl());
 
 } // namespace blink
 
 #endif