Smaller vtbls in RenderObject

Source/core/rendering/RenderTableSection.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, 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 227 matching lines @@
 protected:
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
 private:
     virtual RenderObjectChildList* virtualChildren() override { return children(); }
     virtual const RenderObjectChildList* virtualChildren() const override { return children(); }
 
     virtual const char* renderName() const override { return (isAnonymous() || isPseudoElement()) ? "RenderTableSection (anonymous)" : "RenderTableSection"; }
 
-    virtual bool isTableSection() const override { return true; }
+    virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectTableSection || RenderBox::isOfType(type); }
 
     virtual void willBeRemovedFromTree() override;
 
     virtual void layout() override;
 
     virtual void paintObject(PaintInfo&, const LayoutPoint&) override;
 
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) override;
 
     int borderSpacingForRow(unsigned row) const { return m_grid[row].rowRenderer ? table()->vBorderSpacing() : 0; }
@@ skipping 72 matching lines @@
     static const bool needsDestruction = false;
 };
 template<> struct VectorTraits<blink::RenderTableSection::RowStruct> : VectorTraitsBase<blink::RenderTableSection::RowStruct> {
     static const bool needsDestruction = false;
 };
 #endif
 
 }
 
 #endif // RenderTableSection_h