Do-not-commit: Count layout tree memory usage

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LayoutTableBoxComponent_h
 #define LayoutTableBoxComponent_h
 
 #include "core/CoreExport.h"
 #include "core/layout/LayoutBox.h"
 
@@ skipping 17 matching lines @@
 
   LayoutObject* firstChild() const {
     DCHECK(children() == virtualChildren());
     return children()->firstChild();
   }
   LayoutObject* lastChild() const {
     DCHECK(children() == virtualChildren());
     return children()->lastChild();
   }
 
+  char objectSize() const override { return sizeof(this); }
+
  private:
   // If you have a LayoutTableBoxComponent, use firstChild or lastChild instead.
   void slowFirstChild() const = delete;
   void slowLastChild() const = delete;
 
   LayoutObjectChildList* virtualChildren() override { return children(); }
   const LayoutObjectChildList* virtualChildren() const override {
     return children();
   }
 
   LayoutObjectChildList m_children;
 };
 
 }  // namespace blink
 
 #endif  // LayoutTableBoxComponent_h