Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/layout/svg/LayoutSVGRect.h

 /*
  * Copyright (C) 2011 University of Szeged
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 31 matching lines @@
   }
 
   const char* name() const override { return "LayoutSVGRect"; }
 
  private:
   void updateShapeFromElement() override;
   bool isShapeEmpty() const override {
     return m_usePathFallback ? LayoutSVGShape::isShapeEmpty()
                              : m_fillBoundingBox.isEmpty();
   }
+  char objectSize() const override { return sizeof(this); }
   bool shapeDependentStrokeContains(const FloatPoint&) override;
   bool shapeDependentFillContains(const FloatPoint&,
                                   const WindRule) const override;
   bool definitelyHasSimpleStroke() const;
 
  private:
   bool m_usePathFallback;
 };
 
 }  // namespace blink
 
 #endif