Smaller vtbls in RenderObject

Source/core/rendering/RenderTableCell.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 208 matching lines @@
 #endif
 protected:
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
     virtual void computePreferredLogicalWidths() OVERRIDE;
 
     virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE;
 
 private:
     virtual const char* renderName() const OVERRIDE { return (isAnonymous() || isPseudoElement()) ? "RenderTableCell (anonymous)" : "RenderTableCell"; }
 
-    virtual bool isTableCell() const OVERRIDE { return true; }
+    virtual bool isOfType(RenderObjectType type) const OVERRIDE { return type == RenderObjectTableCell || RenderBlockFlow::isOfType(type); }
 
     virtual void willBeRemovedFromTree() OVERRIDE;
 
     virtual void updateLogicalWidth() OVERRIDE;
 
     virtual void paintBoxDecorationBackground(PaintInfo&, const LayoutPoint&) OVERRIDE;
     virtual void paintMask(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const OVERRIDE;
 
@@ skipping 72 matching lines @@
 
 inline RenderTableCell* RenderTableRow::lastCell() const
 {
     ASSERT(children() == virtualChildren());
     return toRenderTableCell(children()->lastChild());
 }
 
 } // namespace blink
 
 #endif // RenderTableCell_h