Remove position: sticky

Source/core/rendering/RenderBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 687 matching lines @@
     LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth) const;
     LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const;
 
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const;
 
     // This function calculates the minimum and maximum preferred widths for an object.
     // These values are used in shrink-to-fit layout systems.
     // These include tables, positioned objects, floats and flexible boxes.
     virtual void computePreferredLogicalWidths() { clearPreferredLogicalWidthsDirty(); }
 
-    virtual LayoutRect frameRectForStickyPositioning() const OVERRIDE FINAL { return frameRect(); }
-
     RenderBoxRareData& ensureRareData()
     {
         if (!m_rareData)
             m_rareData = adoptPtr(new RenderBoxRareData());
         return *m_rareData.get();
     }
 
 private:
     // The width/height of the contents + borders + padding.  The x/y location is relative to our container (which is not always our parent).
     LayoutRect m_frameRect;
@@ skipping 57 matching lines @@
         if (UNLIKELY(inlineBoxWrapper() != 0))
             deleteLineBoxWrapper();
     }
 
     ensureRareData().m_inlineBoxWrapper = boxWrapper;
 }
 
 } // namespace WebCore
 
 #endif // RenderBox_h