Move the frame tree into the embedder.

Source/web/WebFrameImpl.h

 /*
  * Copyright (C) 2009 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 82 matching lines @@
     virtual WebRect visibleContentRect() const OVERRIDE;
     virtual bool hasHorizontalScrollbar() const OVERRIDE;
     virtual bool hasVerticalScrollbar() const OVERRIDE;
     virtual WebView* view() const OVERRIDE;
     virtual WebFrame* opener() const OVERRIDE;
     virtual void setOpener(const WebFrame*) OVERRIDE;
     virtual void appendChild(WebFrame*) OVERRIDE;
     virtual void removeChild(WebFrame*) OVERRIDE;
     virtual WebFrame* parent() const OVERRIDE;
     virtual WebFrame* top() const OVERRIDE;
+    virtual WebFrame* previousSibling() const OVERRIDE;
+    virtual WebFrame* nextSibling() const OVERRIDE;
     virtual WebFrame* firstChild() const OVERRIDE;
     virtual WebFrame* lastChild() const OVERRIDE;
-    virtual WebFrame* nextSibling() const OVERRIDE;
-    virtual WebFrame* previousSibling() const OVERRIDE;
+    virtual WebFrame* traversePrevious(bool wrap) const OVERRIDE;
     virtual WebFrame* traverseNext(bool wrap) const OVERRIDE;
-    virtual WebFrame* traversePrevious(bool wrap) const OVERRIDE;
     virtual WebFrame* findChildByName(const WebString&) const OVERRIDE;
     virtual WebFrame* findChildByExpression(const WebString&) const OVERRIDE;
     virtual WebDocument document() const OVERRIDE;
     virtual WebPerformance performance() const OVERRIDE;
     virtual NPObject* windowObject() const OVERRIDE;
     virtual void bindToWindowObject(const WebString& name, NPObject*) OVERRIDE;
     virtual void bindToWindowObject(const WebString& name, NPObject*, void*) OVERRIDE;
     virtual void executeScript(const WebScriptSource&) OVERRIDE;
     virtual void executeScriptInIsolatedWorld(
         int worldID, const WebScriptSource* sources, unsigned numSources,
@@ skipping 315 matching lines @@
             setFrameLoaderClient(&m_frameLoaderClientImpl);
         }
 
         FrameLoaderClientImpl m_frameLoaderClientImpl;
     };
     RefPtr<WebFrameInit> m_frameInit;
 
     // The embedder retains a reference to the WebCore Frame while it is active in the DOM. This
     // reference is released when the frame is removed from the DOM or the entire page is closed.
     RefPtr<WebCore::Frame> m_frame;
+    WebFrameImpl* m_parent;
+    WebFrameImpl* m_previousSibling;
+    WebFrameImpl* m_nextSibling;
+    WebFrameImpl* m_firstChild;
+    WebFrameImpl* m_lastChild;
 
     WebFrameClient* m_client;
     WebPermissionClient* m_permissionClient;
     OwnPtr<SharedWorkerRepositoryClientImpl> m_sharedWorkerRepositoryClient;
 
     // A way for the main frame to keep track of which frame has an active
     // match. Should be 0 for all other frames.
     WebFrameImpl* m_currentActiveMatchFrame;
 
     // The range of the active match for the current frame.
@@ skipping 72 matching lines @@
     // Stores the additional input events offset and scale when device metrics emulation is enabled.
     WebCore::IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 };
 
 DEFINE_TYPE_CASTS(WebFrameImpl, WebFrame, frame, true, true);
 
 } // namespace blink
 
 #endif