Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 2010 Apple Inc. 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/layout/LayoutPart.h"
 
 namespace blink {
 
 class LayoutIFrame final : public LayoutPart {
  public:
   explicit LayoutIFrame(Element*);
 
   const char* name() const override { return "LayoutIFrame"; }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   bool shouldComputeSizeAsReplaced() const override;
   bool isInlineBlockOrInlineTable() const override;
 
   void layout() override;
 
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectLayoutIFrame || LayoutPart::isOfType(type);
   }
 
   PaintLayerType layerTypeRequired() const override;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutIFrame, isLayoutIFrame());
 
 }  // namespace blink
 
 #endif  // LayoutIFrame_h