Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 126 matching lines @@
   // CSS properties like 'zoom' or 'image-orientation'.
   virtual void intrinsicSizeChanged();
 
   virtual LayoutReplaced* embeddedReplacedContent() const { return nullptr; }
 
   PositionWithAffinity positionForPoint(const LayoutPoint&) override;
 
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectLayoutReplaced || LayoutBox::isOfType(type);
   }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   void computePreferredLogicalWidths() final;
 
   bool canBeSelectionLeaf() const override { return true; }
 
   void computeIntrinsicSizingInfoForReplacedContent(LayoutReplaced*,
                                                     IntrinsicSizingInfo&) const;
   FloatSize constrainIntrinsicSizeToMinMax(const IntrinsicSizingInfo&) const;
 
   LayoutUnit computeConstrainedLogicalWidth(ShouldComputePreferred) const;
 
   mutable LayoutSize m_intrinsicSize;
 };
 
 }  // namespace blink
 
 #endif