Invert the owning relationship between WebFrame and Frame.

Source/web/FrameLoaderClientImpl.h

Index: Source/web/FrameLoaderClientImpl.h
diff --git a/Source/web/FrameLoaderClientImpl.h b/Source/web/FrameLoaderClientImpl.h
index 1609a383b72d08dd3f6e07da3dd3abcf17d75be2..487a6bb55cf2a5b729a755e122f748cae674926c 100644
--- a/Source/web/FrameLoaderClientImpl.h
+++ b/Source/web/FrameLoaderClientImpl.h
@@ -52,8 +52,6 @@ public:
 
     // 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.
@@ -72,6 +70,7 @@ public:
 
     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);