Revert of Refactor ScrollableArea::setScrollPosition.

third_party/WebKit/Source/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 362 matching lines @@
     m_verticalScrollbarNeedsPaintInvalidation = false;
     m_scrollCornerNeedsPaintInvalidation = false;
   }
 
  private:
   void programmaticScrollHelper(const DoublePoint&, ScrollBehavior);
   void userScrollHelper(const DoublePoint&, ScrollBehavior);
 
   // This function should be overriden by subclasses to perform the actual
   // scroll of the content.
-  virtual void setScrollOffset(const DoublePoint&, ScrollType) = 0;
+  virtual void setScrollOffset(const DoublePoint& offset, ScrollType) = 0;
 
   virtual int lineStep(ScrollbarOrientation) const;
   virtual int pageStep(ScrollbarOrientation) const;
   virtual int documentStep(ScrollbarOrientation) const;
   virtual float pixelStep(ScrollbarOrientation) const;
 
   mutable Member<ScrollAnimatorBase> m_scrollAnimator;
   mutable Member<ProgrammaticScrollAnimator> m_programmaticScrollAnimator;
 
   unsigned m_scrollbarOverlayStyle : 2;  // ScrollbarOverlayStyle
@@ skipping 13 matching lines @@
   // 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  // ScrollableArea_h