Remove some dead code from rendering/ folder

Source/core/rendering/RenderFlowThread.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 82 matching lines @@
 
     virtual void setPageBreak(LayoutUnit /*offset*/, LayoutUnit /*spaceShortage*/) { }
     virtual void updateMinimumPageHeight(LayoutUnit /*offset*/, LayoutUnit /*minHeight*/) { }
 
     enum RegionAutoGenerationPolicy {
         AllowRegionAutoGeneration,
         DisallowRegionAutoGeneration,
     };
     RenderRegion* regionAtBlockOffset(LayoutUnit, bool extendLastRegion = false, RegionAutoGenerationPolicy = AllowRegionAutoGeneration);
 
-    RenderRegion* regionFromAbsolutePointAndBox(IntPoint, const RenderBox* flowedBox);
-
     bool regionsHaveUniformLogicalHeight() const { return m_regionsHaveUniformLogicalHeight; }
 
     RenderRegion* mapFromFlowToRegion(TransformState&) const;
 
     RenderRegion* firstRegion() const;
     RenderRegion* lastRegion() const;
 
     bool previousRegionCountChanged() const { return m_previousRegionCount != m_regionList.size(); }
     void updatePreviousRegionCount() { m_previousRegionCount = m_regionList.size(); }
 
@@ skipping 20 matching lines @@
     virtual const char* renderName() const = 0;
 
     // Overridden by columns/pages to set up an initial logical width of the page width even when
     // no regions have been generated yet.
     virtual LayoutUnit initialLogicalWidth() const { return 0; };
 
     virtual void mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const OVERRIDE FINAL;
 
     void updateRegionsFlowThreadPortionRect();
     bool shouldRepaint(const LayoutRect&) const;
-    bool regionInRange(const RenderRegion* targetRegion, const RenderRegion* startRegion, const RenderRegion* endRegion) const;
 
-    LayoutRect computeRegionClippingRect(const LayoutPoint&, const LayoutRect&, const LayoutRect&) const;
-
-    virtual void autoGenerateRegionsToBlockOffset(LayoutUnit) { };
+    virtual void autoGenerateRegionsToBlockOffset(LayoutUnit) { }
 
     bool cachedOffsetFromLogicalTopOfFirstRegion(const RenderBox*, LayoutUnit&) const;
     void setOffsetFromLogicalTopOfFirstRegion(const RenderBox*, LayoutUnit);
     void clearOffsetFromLogicalTopOfFirstRegion(const RenderBox*);
 
     const RenderBox* currentStatePusherRenderBox() const;
 
     RenderRegionList m_regionList;
     unsigned short m_previousRegionCount;
 
@@ skipping 82 matching lines @@
 };
 
 template <> struct ValueToString<RenderRegion*> {
     static String string(const RenderRegion* value) { return String::format("%p", value); }
 };
 #endif
 
 } // namespace WebCore
 
 #endif // RenderFlowThread_h