Smaller vtbls in RenderObject

Source/core/rendering/RenderTextControl.h

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 51 matching lines @@
 
     virtual void updateFromElement() override;
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
     virtual RenderObject* layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&) override;
 
     // We need to override this function because we don't want overflow:hidden on an <input>
     // to affect the baseline calculation. This is necessary because we are an inline-block
     // 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 { }
     virtual bool avoidsFloats() const override final { return true; }
     virtual bool canHaveGeneratedChildren() const override final { return false; }
 
     virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) override final;
 
     virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const override final;
 
@@ skipping 18 matching lines @@
         return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
     }
     virtual int firstLineBoxBaseline() const override { return RenderBlock::firstLineBoxBaseline(); }
     virtual int inlineBlockBaseline(LineDirectionMode direction) const override { return lastLineBoxBaseline(direction); }
 };
 
 
 } // namespace blink
 
 #endif // RenderTextControl_h