Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 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 21 matching lines @@
 
 class LayoutFrame final : public LayoutPart {
  public:
   explicit LayoutFrame(HTMLFrameElement*);
 
   FrameEdgeInfo edgeInfo() const;
 
   void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
 
   const char* name() const override { return "LayoutFrame"; }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectFrame || LayoutPart::isOfType(type);
   }
 
   void updateFromElement() override;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutFrame, isFrame());
 
 }  // namespace blink
 
 #endif  // LayoutFrame_h