Revert "Cleanup deadcode in Rendering"

Source/core/rendering/RenderRegion.h

Index: Source/core/rendering/RenderRegion.h
diff --git a/Source/core/rendering/RenderRegion.h b/Source/core/rendering/RenderRegion.h
index 3befba67afe13af1f9ce45fb62b6e9a7a7fa41cc..06ae7bd76f719d60bfeac6402eaaa7f92abcd201 100644
--- a/Source/core/rendering/RenderRegion.h
+++ b/Source/core/rendering/RenderRegion.h
@@ -64,6 +64,11 @@ public:
     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; }