Remove ACCELERATED_OVERFLOW_SCROLLING as it is always off.

Source/core/rendering/style/RenderStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 866 matching lines @@
     Length perspectiveOriginY() const { return rareNonInheritedData->m_perspectiveOriginY; }
     LengthSize pageSize() const { return rareNonInheritedData->m_pageSize; }
     PageSizeType pageSizeType() const { return static_cast<PageSizeType>(rareNonInheritedData->m_pageSizeType); }
     
     // When set, this ensures that styles compare as different. Used during accelerated animations.
     bool isRunningAcceleratedAnimation() const { return rareNonInheritedData->m_runningAcceleratedAnimation; }
 
     LineBoxContain lineBoxContain() const { return rareInheritedData->m_lineBoxContain; }
     const LineClampValue& lineClamp() const { return rareNonInheritedData->lineClamp; }
     Color tapHighlightColor() const { return rareInheritedData->tapHighlightColor; }
-#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
-    bool useTouchOverflowScrolling() const { return rareInheritedData->useTouchOverflowScrolling; }
-#endif
     ETextSecurity textSecurity() const { return static_cast<ETextSecurity>(rareInheritedData->textSecurity); }
 
     WritingMode writingMode() const { return static_cast<WritingMode>(inherited_flags.m_writingMode); }
     bool isHorizontalWritingMode() const { return WebCore::isHorizontalWritingMode(writingMode()); }
     bool isFlippedLinesWritingMode() const { return WebCore::isFlippedLinesWritingMode(writingMode()); }
     bool isFlippedBlocksWritingMode() const { return WebCore::isFlippedBlocksWritingMode(writingMode()); }
 
     EImageRendering imageRendering() const { return static_cast<EImageRendering>(rareInheritedData->m_imageRendering); }
 
     ESpeak speak() const { return static_cast<ESpeak>(rareInheritedData->speak); }
@@ skipping 406 matching lines @@
     void setPerspectiveOriginY(Length l) { SET_VAR(rareNonInheritedData, m_perspectiveOriginY, l); }
     void setPageSize(LengthSize s) { SET_VAR(rareNonInheritedData, m_pageSize, s); }
     void setPageSizeType(PageSizeType t) { SET_VAR(rareNonInheritedData, m_pageSizeType, t); }
     void resetPageSizeType() { SET_VAR(rareNonInheritedData, m_pageSizeType, PAGE_SIZE_AUTO); }
 
     void setIsRunningAcceleratedAnimation(bool b = true) { SET_VAR(rareNonInheritedData, m_runningAcceleratedAnimation, b); }
 
     void setLineBoxContain(LineBoxContain c) { SET_VAR(rareInheritedData, m_lineBoxContain, c); }
     void setLineClamp(LineClampValue c) { SET_VAR(rareNonInheritedData, lineClamp, c); }
     void setTapHighlightColor(const Color& c) { SET_VAR(rareInheritedData, tapHighlightColor, c); }
-#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
-    void setUseTouchOverflowScrolling(bool v) { SET_VAR(rareInheritedData, useTouchOverflowScrolling, v); }
-#endif
     void setTextSecurity(ETextSecurity aTextSecurity) { SET_VAR(rareInheritedData, textSecurity, aTextSecurity); }
     void setTouchAction(TouchAction t) { SET_VAR(rareNonInheritedData, m_touchAction, t); }
 
     const SVGRenderStyle* svgStyle() const { return m_svgStyle.get(); }
     SVGRenderStyle* accessSVGStyle() { return m_svgStyle.access(); }
 
     const SVGPaint::SVGPaintType& fillPaintType() const { return svgStyle()->fillPaintType(); }
     Color fillPaintColor() const { return svgStyle()->fillPaintColor(); }
     void setFillPaintColor(const Color& c) { accessSVGStyle()->setFillPaint(SVGPaint::SVG_PAINTTYPE_RGBCOLOR, c, ""); }
     float fillOpacity() const { return svgStyle()->fillOpacity(); }
@@ skipping 299 matching lines @@
     static const AtomicString& initialRegionThread() { return nullAtom; }
     static RegionFragment initialRegionFragment() { return AutoRegionFragment; }
 
     static WrapFlow initialWrapFlow() { return WrapFlowAuto; }
     static WrapThrough initialWrapThrough() { return WrapThroughWrap; }
 
     // Keep these at the end.
     static LineClampValue initialLineClamp() { return LineClampValue(); }
     static ETextSecurity initialTextSecurity() { return TSNONE; }
     static Color initialTapHighlightColor();
-#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
-    static bool initialUseTouchOverflowScrolling() { return false; }
-#endif
     static const FilterOperations& initialFilter() { DEFINE_STATIC_LOCAL(FilterOperations, ops, ()); return ops; }
     static BlendMode initialBlendMode() { return BlendModeNormal; }
 private:
     void setVisitedLinkColor(const Color&);
     void setVisitedLinkBackgroundColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBackgroundColor, v); }
     void setVisitedLinkBorderLeftColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBorderLeftColor, v); }
     void setVisitedLinkBorderRightColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBorderRightColor, v); }
     void setVisitedLinkBorderBottomColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBorderBottomColor, v); }
     void setVisitedLinkBorderTopColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkBorderTopColor, v); }
     void setVisitedLinkOutlineColor(const Color& v) { SET_VAR(rareNonInheritedData, m_visitedLinkOutlineColor, v); }
@@ skipping 112 matching lines @@
     if (compareEqual(rareInheritedData->m_textOrientation, textOrientation))
         return false;
 
     rareInheritedData.access()->m_textOrientation = textOrientation;
     return true;
 }
 
 } // namespace WebCore
 
 #endif // RenderStyle_h