Revert "Cleanup deadcode in Rendering"

Source/core/rendering/RenderRegion.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 46 matching lines @@
 
     bool isFirstRegion() const;
     bool isLastRegion() const;
 
     // These methods represent the width and height of a "page" and for a RenderRegion they are just
     // the content width and content height of a region. For RenderMultiColumnSets, however, they
     // will be the width and height of a single column or page in the set.
     virtual LayoutUnit pageLogicalWidth() const;
     virtual LayoutUnit pageLogicalHeight() const;
 
+    LayoutUnit logicalTopOfFlowThreadContentRect(const LayoutRect&) const;
+    LayoutUnit logicalBottomOfFlowThreadContentRect(const LayoutRect&) const;
+    LayoutUnit logicalTopForFlowThreadContent() const { return logicalTopOfFlowThreadContentRect(flowThreadPortionRect()); };
+    LayoutUnit logicalBottomForFlowThreadContent() const { return logicalBottomOfFlowThreadContentRect(flowThreadPortionRect()); };
+
     virtual bool canHaveChildren() const OVERRIDE FINAL { return false; }
     virtual bool canHaveGeneratedChildren() const OVERRIDE FINAL { return true; }
 
     virtual const char* renderName() const OVERRIDE { return "RenderRegion"; }
 
 protected:
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE FINAL;
 
     LayoutRect overflowRectForFlowThreadPortion(const LayoutRect& flowThreadPortionRect, bool isFirstPortion, bool isLastPortion) const;
     void repaintFlowThreadContentRectangle(const LayoutRect& repaintRect, const LayoutRect& flowThreadPortionRect,
         const LayoutRect& flowThreadPortionOverflowRect, const LayoutPoint& regionLocation) const;
 
 private:
     virtual void layoutBlock(bool relayoutChildren) OVERRIDE FINAL;
 
 protected:
     RenderFlowThread* m_flowThread;
 
 private:
     LayoutRect m_flowThreadPortionRect;
     bool m_isValid : 1;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderRegion, isRenderRegion());
 
 } // namespace blink
 
 #endif // RenderRegion_h