Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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.
  *
  * 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 @@
 
 class AffineTransform;
 class GraphicsContext;
 
 class LayoutSVGResourceMasker final : public LayoutSVGResourceContainer {
  public:
   explicit LayoutSVGResourceMasker(SVGMaskElement*);
   ~LayoutSVGResourceMasker() override;
 
   const char* name() const override { return "LayoutSVGResourceMasker"; }
+  char objectSize() const override { return sizeof(this); }
+  char approximateHeapMemoryUsage() const override {
+    int memory = LayoutSVGResourceContainer::approximateHeapMemoryUsage();
+    // TODO(pdr): Include memory from m_cachedPaintRecord.
+    return memory;
+  }
 
   void removeAllClientsFromCache(bool markForInvalidation = true) override;
   void removeClientFromCache(LayoutObject*,
                              bool markForInvalidation = true) override;
 
   FloatRect resourceBoundingBox(const LayoutObject*);
 
   SVGUnitTypes::SVGUnitType maskUnits() const {
     return toSVGMaskElement(element())
         ->maskUnits()
@@ skipping 20 matching lines @@
   sk_sp<const PaintRecord> m_cachedPaintRecord;
   FloatRect m_maskContentBoundaries;
 };
 
 DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(LayoutSVGResourceMasker,
                                       MaskerResourceType);
 
 }  // namespace blink
 
 #endif