Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  *
  * 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 23 matching lines @@
 
   const char* name() const override { return "LayoutSVGHiddenContainer"; }
 
  protected:
   void layout() override;
 
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVGHiddenContainer ||
            LayoutSVGContainer::isOfType(type);
   }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   // LayoutSVGHiddenContainer paints nothing.
   void paint(const PaintInfo&, const LayoutPoint&) const final {}
   bool paintedOutputOfObjectHasNoEffectRegardlessOfSize() const final {
     return true;
   }
   LayoutRect absoluteVisualRect() const final { return LayoutRect(); }
   FloatRect visualRectInLocalSVGCoordinates() const final {
     return FloatRect();
   }
   void absoluteQuads(Vector<FloatQuad>&,
                      MapCoordinatesFlags mode = 0) const final {}
 
   bool nodeAtFloatPoint(HitTestResult&,
                         const FloatPoint& pointInParent,
                         HitTestAction) final;
 };
 }  // namespace blink
 
 #endif  // LayoutSVGHiddenContainer_h