Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2009 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 17 matching lines @@
 
 namespace blink {
 
 class LayoutFieldset final : public LayoutBlockFlow {
  public:
   explicit LayoutFieldset(Element*);
 
   LayoutBox* findInFlowLegend() const;
 
   const char* name() const override { return "LayoutFieldset"; }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectFieldset || LayoutBlockFlow::isOfType(type);
   }
 
   LayoutObject* layoutSpecialExcludedChild(bool relayoutChildren,
                                            SubtreeLayoutScope&) override;
 
   void computePreferredLogicalWidths() override;
   bool avoidsFloats() const override { return true; }
 
   void paintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint&) const override;
   void paintMask(const PaintInfo&, const LayoutPoint&) const override;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutFieldset, isFieldset());
 
 }  // namespace blink
 
 #endif  // LayoutFieldset_h