Delete some noop and dead scrollbar code.

sky/engine/platform/scroll/ScrollableArea.h

 /*
  * Copyright (C) 2008, 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:
  * 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 47 matching lines @@
     static int maxOverlapBetweenPages();
 
     // The window that hosts the ScrollView. The ScrollView will communicate scrolls and repaints to the
     // host window in the window's coordinate space.
     virtual HostWindow* hostWindow() const = 0;
 
     bool scroll(ScrollDirection, ScrollGranularity, float delta = 1);
     void scrollToOffsetWithoutAnimation(const FloatPoint&);
     void scrollToOffsetWithoutAnimation(ScrollbarOrientation, float offset);
 
-    // Should be called when the scroll position changes externally, for example if the scroll layer position
-    // is updated on the scrolling thread and we need to notify the main thread.
-    void notifyScrollPositionChanged(const IntPoint&);
-
     static bool scrollBehaviorFromString(const String&, ScrollBehavior&);
 
     bool handleWheelEvent(const PlatformWheelEvent&);
 
     // Functions for controlling if you can scroll past the end of the document.
     bool constrainsScrollingToContentEdge() const { return m_constrainsScrollingToContentEdge; }
     void setConstrainsScrollingToContentEdge(bool constrainsScrollingToContentEdge) { m_constrainsScrollingToContentEdge = constrainsScrollingToContentEdge; }
 
     void setVerticalScrollElasticity(ScrollElasticity scrollElasticity) { m_verticalScrollElasticity = scrollElasticity; }
     ScrollElasticity verticalScrollElasticity() const { return static_cast<ScrollElasticity>(m_verticalScrollElasticity); }
@@ skipping 10 matching lines @@
     void contentAreaDidHide() const;
 
     void finishCurrentScrollAnimations() const;
 
     void didAddScrollbar(Scrollbar*, ScrollbarOrientation);
     void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation);
 
     void contentsResized();
 
     bool hasOverlayScrollbars() const;
-    void setScrollbarOverlayStyle(ScrollbarOverlayStyle);
-    ScrollbarOverlayStyle scrollbarOverlayStyle() const { return static_cast<ScrollbarOverlayStyle>(m_scrollbarOverlayStyle); }
 
     // This getter will create a ScrollAnimator if it doesn't already exist.
     ScrollAnimator* scrollAnimator() const;
 
     // This getter will return null if the ScrollAnimator hasn't been created yet.
     ScrollAnimator* existingScrollAnimator() const { return m_animators ? m_animators->scrollAnimator.get() : 0; }
 
     const IntPoint& scrollOrigin() const { return m_scrollOrigin; }
     bool scrollOriginChanged() const { return m_scrollOriginChanged; }
 
@@ skipping 15 matching lines @@
     // scrollPosition is relative to the scrollOrigin. i.e. If the page is RTL
     // then scrollPosition will be negative.
     virtual IntPoint scrollPosition() const = 0;
     virtual IntPoint minimumScrollPosition() const = 0;
     virtual IntPoint maximumScrollPosition() const = 0;
 
     virtual IntSize contentsSize() const = 0;
 
     bool shouldSuspendScrollAnimations() const { return true; }
 
-    // NOTE: Only called from Internals for testing.
-    void setScrollOffsetFromInternals(const IntPoint&);
-
     IntPoint clampScrollPosition(const IntPoint&) const;
 
     // Let subclasses provide a way of asking for and servicing scroll
     // animations.
     bool scheduleAnimation();
     void serviceScrollAnimations(double monotonicTime);
 
     // Returns true if the GraphicsLayer tree needs to be rebuilt.
     virtual bool updateAfterCompositingChange() = 0;
 
@@ skipping 31 matching lines @@
     struct ScrollableAreaAnimators {
         OwnPtr<ScrollAnimator> scrollAnimator;
     };
 
     mutable OwnPtr<ScrollableAreaAnimators> m_animators;
     unsigned m_constrainsScrollingToContentEdge : 1;
 
     unsigned m_verticalScrollElasticity : 2; // ScrollElasticity
     unsigned m_horizontalScrollElasticity : 2; // ScrollElasticity
 
-    unsigned m_scrollbarOverlayStyle : 2; // ScrollbarOverlayStyle
-
     unsigned m_scrollOriginChanged : 1;
 
     // There are 8 possible combinations of writing mode and direction. Scroll origin will be non-zero in the x or y axis
     // if there is any reversed direction or writing-mode. The combinations are:
     // writing-mode / direction     scrollOrigin.x() set    scrollOrigin.y() set
     // horizontal-tb / ltr          NO                      NO
     // horizontal-tb / rtl          YES                     NO
     // horizontal-bt / ltr          NO                      YES
     // horizontal-bt / rtl          YES                     YES
     // vertical-lr / ltr            NO                      NO
     // vertical-lr / rtl            NO                      YES
     // vertical-rl / ltr            YES                     NO
     // vertical-rl / rtl            YES                     YES
     IntPoint m_scrollOrigin;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PLATFORM_SCROLL_SCROLLABLEAREA_H_