Do-not-commit: Count layout tree memory usage

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

 /*
  * This file is part of the layout object implementation for KHTML.
  *
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * 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 17 matching lines @@
 namespace blink {
 
 class FlexBoxIterator;
 
 class LayoutDeprecatedFlexibleBox final : public LayoutBlock {
  public:
   LayoutDeprecatedFlexibleBox(Element&);
   ~LayoutDeprecatedFlexibleBox() override;
 
   const char* name() const override { return "LayoutDeprecatedFlexibleBox"; }
+  char objectSize() const override { return sizeof(this); }
 
   void styleWillChange(StyleDifference, const ComputedStyle& newStyle) override;
 
   void layoutBlock(bool relayoutChildren) override;
   void layoutHorizontalBox(bool relayoutChildren);
   void layoutVerticalBox(bool relayoutChildren);
 
   bool isDeprecatedFlexibleBox() const override { return true; }
   bool isStretchingChildren() const { return m_stretchingChildren; }
 
@@ skipping 15 matching lines @@
 
   bool m_stretchingChildren;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutDeprecatedFlexibleBox,
                                 isDeprecatedFlexibleBox());
 
 }  // namespace blink
 
 #endif  // LayoutDeprecatedFlexibleBox_h