Get rid of ScrollView.

sky/engine/platform/scroll/Scrollbar.h

 /*
  * Copyright (C) 2004, 2006 Apple Computer, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 #include "wtf/MathExtras.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 class GraphicsContext;
 class IntRect;
 class PlatformGestureEvent;
 class PlatformMouseEvent;
 class ScrollableArea;
-class ScrollView;
 
 class PLATFORM_EXPORT Scrollbar : public Widget {
 
 public:
     static PassRefPtr<Scrollbar> create(ScrollableArea*, ScrollbarOrientation);
 
     virtual ~Scrollbar();
 
     int x() const { return Widget::x(); }
     int y() const { return Widget::y(); }
     int width() const { return Widget::width(); }
     int height() const { return Widget::height(); }
     IntSize size() const { return Widget::size(); }
     IntPoint location() const { return Widget::location(); }
 
     Widget* parent() const { return Widget::parent(); }
     Widget* root() const { return Widget::root(); }
 
     void removeFromParent();
-    ScrollView* parentScrollView() const;
-    ScrollView* rootScrollView() const;
 
     void setFrameRect(const IntRect& r) { Widget::setFrameRect(r); }
     IntRect frameRect() const { return Widget::frameRect(); }
 
     void invalidate() { Widget::invalidate(); }
     void invalidateRect(const IntRect&);
 
     ScrollbarOverlayStyle scrollbarOverlayStyle() const;
     void getTickmarks(Vector<IntRect>&) const;
     bool isScrollableAreaActive() const;
@@ skipping 151 matching lines @@
     virtual bool isScrollbar() const OVERRIDE { return true; }
 
     float scrollableAreaCurrentPos() const;
 };
 
 DEFINE_TYPE_CASTS(Scrollbar, Widget, widget, widget->isScrollbar(), widget.isScrollbar());
 
 } // namespace blink
 
 #endif // Scrollbar_h