Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 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
@@ skipping 68 matching lines @@
     m_imageDevicePixelRatio = factor;
   }
   float imageDevicePixelRatio() const { return m_imageDevicePixelRatio; }
 
   void intrinsicSizeChanged() override {
     if (m_imageResource)
       imageChanged(m_imageResource->imagePtr());
   }
 
   const char* name() const override { return "LayoutImage"; }
+  char objectSize() const override { return sizeof(this); }
 
  protected:
   bool needsPreferredWidthsRecalculation() const final;
   LayoutReplaced* embeddedReplacedContent() const final;
   void computeIntrinsicSizingInfo(IntrinsicSizingInfo&) const final;
 
   void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
 
   void paint(const PaintInfo&, const LayoutPoint&) const final;
 
@@ skipping 42 matching lines @@
   // This field stores whether this image is generated with 'content'.
   bool m_isGeneratedContent;
   float m_imageDevicePixelRatio;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutImage, isLayoutImage());
 
 }  // namespace blink
 
 #endif  // LayoutImage_h