Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (c) 2009, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
       LayoutGeometryMap&) const final;
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
 
   void computeLayerHitTestRects(LayerHitTestRects&) const final;
 
   SVGElement* element() const { return toSVGElement(LayoutObject::node()); }
 
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVG || LayoutObject::isOfType(type);
   }
+  char objectSize() const override { return sizeof(this); }
 
  protected:
   void addLayerHitTestRects(LayerHitTestRects&,
                             const PaintLayer* currentCompositedLayer,
                             const LayoutPoint& layerOffset,
                             const LayoutRect& containerRect) const final;
   void willBeDestroyed() override;
 
  private:
   // LayoutSVGModelObject subclasses should use element() instead.
   void node() const = delete;
 
   // This method should never be called, SVG uses a different nodeAtPoint method
   bool nodeAtPoint(HitTestResult&,
                    const HitTestLocation& locationInContainer,
                    const LayoutPoint& accumulatedOffset,
                    HitTestAction) final;
   IntRect absoluteElementBoundingBoxRect() const final;
 
  protected:
   FloatRect m_localVisualRect;
 };
 
 }  // namespace blink
 
 #endif