Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 2005 Apple Computer
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 19 matching lines @@
 // LayoutButtons are just like normal flexboxes except that they will generate
 // an anonymous block child.
 // For inputs, they will also generate an anonymous LayoutText and keep its
 // style and content up to date as the button changes.
 class LayoutButton final : public LayoutFlexibleBox {
  public:
   explicit LayoutButton(Element*);
   ~LayoutButton() override;
 
   const char* name() const override { return "LayoutButton"; }
+  char objectSize() const override { return sizeof(this); }
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectLayoutButton ||
            LayoutFlexibleBox::isOfType(type);
   }
 
   bool canBeSelectionLeaf() const override {
     return node() && hasEditableStyle(*node());
   }
 
   void addChild(LayoutObject* newChild,
@@ skipping 17 matching lines @@
   bool hasLineIfEmpty() const override { return isHTMLInputElement(node()); }
 
   LayoutBlock* m_inner;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutButton, isLayoutButton());
 
 }  // namespace blink
 
 #endif  // LayoutButton_h