Remove the concept of document.documentElement

sky/engine/core/rendering/RenderView.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 66 matching lines @@
     RenderObject* selectionStart() const { return m_selectionStart; }
     RenderObject* selectionEnd() const { return m_selectionEnd; }
     void selectionStartEnd(int& startPos, int& endPos) const;
 
     virtual void absoluteQuads(Vector<FloatQuad>&) const override;
 
     virtual LayoutRect viewRect() const override;
 
     LayoutState* layoutState() const { return m_layoutState; }
 
-    virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) override;
-
     IntRect unscaledDocumentRect() const;
     LayoutRect backgroundRect(RenderBox* backgroundRenderer) const;
 
     IntRect documentRect() const;
 
-    // Renderer that paints the root background has background-images which all have background-attachment: fixed.
-    bool rootBackgroundIsEntirelyFixed() const;
-
     double layoutViewportWidth() const;
     double layoutViewportHeight() const;
 
     void pushLayoutState(LayoutState&);
     void popLayoutState();
 
     void addIFrame(RenderIFrame* iframe);
     void removeIFrame(RenderIFrame* iframe);
     void updateIFramesAfterLayout();
 
 private:
     virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip) const override;
     virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const override;
     virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const override;
 
     void layoutContent();
 #if ENABLE(ASSERT)
     void checkLayoutState();
 #endif
 
     void positionDialog(RenderBox*);
     void positionDialogs();
 
-    RenderObject* backgroundRenderer() const;
-
     FrameView* m_frameView;
 
     RawPtr<RenderObject> m_selectionStart;
     RawPtr<RenderObject> m_selectionEnd;
 
     int m_selectionStartPos;
     int m_selectionEndPos;
 
     LayoutState* m_layoutState;
 
     unsigned m_renderCounterCount;
 
     unsigned m_hitTestCount;
 
     WTF::HashSet<RenderIFrame*> m_iframes;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderView, isRenderView());
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDERVIEW_H_