Remove mouse events from Sky

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 20 matching lines @@
 #include "sky/engine/platform/scroll/ScrollTypes.h"
 #include "sky/engine/platform/scroll/Scrollbar.h"
 #include "sky/engine/wtf/MathExtras.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 
 namespace blink {
 
 class GraphicsContext;
 class IntRect;
 class PlatformGestureEvent;
-class PlatformMouseEvent;
 class ScrollableArea;
 
 class PLATFORM_EXPORT Scrollbar final : public Widget {
 public:
     static PassRefPtr<Scrollbar> create(ScrollableArea*, ScrollbarOrientation);
 
     virtual ~Scrollbar();
 
     bool isScrollableAreaActive() const;
 
@@ skipping 20 matching lines @@
     void setProportion(int visibleSize, int totalSize);
     void setPressedPos(int p) { m_pressedPos = p; }
 
     virtual void paint(GraphicsContext*, const IntRect& damageRect) override;
 
     bool isOverlayScrollbar() const;
     bool shouldParticipateInHitTesting();
 
     bool gestureEvent(const PlatformGestureEvent&);
 
-    // These methods are used for platform scrollbars to give :hover feedback.  They will not get called
-    // when the mouse went down in a scrollbar, since it is assumed the scrollbar will start
-    // grabbing all events in that case anyway.
-    void mouseMoved(const PlatformMouseEvent&);
     void mouseEntered();
     void mouseExited();
 
-    // Used by some platform scrollbars to know when they've been released from capture.
-    void mouseUp(const PlatformMouseEvent&);
-    void mouseDown(const PlatformMouseEvent&);
-
     virtual IntRect convertToContainingView(const IntRect&) const override;
     virtual IntRect convertFromContainingView(const IntRect&) const override;
 
     virtual IntPoint convertToContainingView(const IntPoint&) const override;
     virtual IntPoint convertFromContainingView(const IntPoint&) const override;
 
     void moveThumb(int pos);
 
     static int scrollbarThickness();
 
@@ skipping 52 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  // SKY_ENGINE_PLATFORM_SCROLL_SCROLLBAR_H_