Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010-2012. 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 45 matching lines @@
   bool needsReordering() const { return m_needsReordering; }
   const Vector<LayoutSVGInlineText*>& descendantTextNodes() const {
     return m_descendantTextNodes;
   }
 
   void subtreeChildWasAdded();
   void subtreeChildWillBeRemoved();
   void subtreeTextDidChange();
 
   const char* name() const override { return "LayoutSVGText"; }
+  char objectSize() const override { return sizeof(this); }
+  char approximateHeapMemoryUsage() const override {
+    int memory = LayoutSVGBlock::approximateHeapMemoryUsage();
+    // TODO(pdr): Include memory from m_descendantTextNodes.
+    return memory;
+  }
 
  private:
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVGText || LayoutSVGBlock::isOfType(type);
   }
 
   void paint(const PaintInfo&, const LayoutPoint&) const override;
   bool nodeAtFloatPoint(HitTestResult&,
                         const FloatPoint& pointInParent,
                         HitTestAction) override;
@@ skipping 20 matching lines @@
   bool m_needsTransformUpdate : 1;
   bool m_needsTextMetricsUpdate : 1;
   Vector<LayoutSVGInlineText*> m_descendantTextNodes;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGText, isSVGText());
 
 }  // namespace blink
 
 #endif