Smaller vtbls in RenderObject

Source/core/rendering/RenderTextControl.h

Index: Source/core/rendering/RenderTextControl.h
diff --git a/Source/core/rendering/RenderTextControl.h b/Source/core/rendering/RenderTextControl.h
index a042009448123b172bea15a5a81e3223cacd9a4f..4bbb1b4d5876cda98eaa7080d57313d5cb90d7cc 100644
--- a/Source/core/rendering/RenderTextControl.h
+++ b/Source/core/rendering/RenderTextControl.h
@@ -69,9 +69,10 @@ protected:
     // element as an implementation detail which would normally be affected by this.
     virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return lastLineBoxBaseline(direction); }
 
+    virtual bool isOfType(RenderObjectType type) const OVERRIDE { return type == RenderObjectTextControl || RenderBlockFlow::isOfType(type); }
+
 private:
     virtual const char* renderName() const OVERRIDE { return "RenderTextControl"; }
-    virtual bool isTextControl() const OVERRIDE FINAL { return true; }
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE FINAL;
     virtual void computePreferredLogicalWidths() OVERRIDE FINAL;
     virtual void removeLeftoverAnonymousBlock(RenderBlock*) OVERRIDE FINAL { }