Clean-up hit-testing of scrollbars

Source/platform/scroll/ScrollView.h

 /*
  * Copyright (C) 2004, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Holger Hans Peter Freyther
  *
  * 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
@@ skipping 186 matching lines @@
 
     virtual void setParent(Widget*) OVERRIDE; // Overridden to update the overlapping scrollbar count.
 
     // Called when our frame rect changes (or the rect/scroll position of an ancestor changes).
     virtual void frameRectsChanged() OVERRIDE;
 
     // Widget override to update our scrollbars and notify our contents of the resize.
     virtual void setFrameRect(const IntRect&) OVERRIDE;
 
     // For platforms that need to hit test scrollbars from within the engine's event handlers (like Win32).
-    Scrollbar* scrollbarAtPoint(const IntPoint& windowPoint);
+    Scrollbar* scrollbarAtWindowPoint(const IntPoint& windowPoint);
+    Scrollbar* scrollbarAtViewPoint(const IntPoint& viewPoint);
 
     virtual IntPoint convertChildToSelf(const Widget* child, const IntPoint& point) const OVERRIDE
     {
         IntPoint newPoint = point;
         if (!isScrollViewScrollbar(child))
             newPoint = point - scrollOffset();
         newPoint.moveBy(child->location());
         return newPoint;
     }
 
@@ skipping 123 matching lines @@
 
     void calculateOverhangAreasForPainting(IntRect& horizontalOverhangRect, IntRect& verticalOverhangRect);
     void updateOverhangAreas();
 }; // class ScrollView
 
 DEFINE_TYPE_CASTS(ScrollView, Widget, widget, widget->isScrollView(), widget.isScrollView());
 
 } // namespace blink
 
 #endif // ScrollView_h