Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/layout/LayoutFrameSet.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2006, 2008 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 90 matching lines @@
     Vector<bool> m_allowBorder;
     int m_splitBeingResized;
     int m_splitResizeOffset;
   };
 
   const GridAxis& rows() const { return m_rows; }
   const GridAxis& columns() const { return m_cols; }
 
   const char* name() const override { return "LayoutFrameSet"; }
 
+  char objectSize() const override { return sizeof(this); }
+
  private:
   static const int noSplit = -1;
 
   LayoutObjectChildList* virtualChildren() override { return children(); }
   const LayoutObjectChildList* virtualChildren() const override {
     return children();
   }
 
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectFrameSet || LayoutBox::isOfType(type);
@@ skipping 29 matching lines @@
 
   bool m_isResizing;
   bool m_isChildResizing;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutFrameSet, isFrameSet());
 
 }  // namespace blink
 
 #endif  // LayoutFrameSet_h