Do-not-commit: Count layout tree memory usage

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

 /*
  * Copyright (C) Research In Motion Limited 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 33 matching lines @@
   virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
   virtual void removeClientFromCache(LayoutObject*,
                                      bool markForInvalidation = true) = 0;
 
   void layout() override;
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) final;
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVGResourceContainer ||
            LayoutSVGHiddenContainer::isOfType(type);
   }
+  char objectSize() const override { return sizeof(this); }
+  char approximateHeapMemoryUsage() const override {
+    int memory = LayoutSVGHiddenContainer::approximateHeapMemoryUsage();
+    // TODO(pdr): Include memory from m_clients.
+    return memory;
+  }
 
   virtual LayoutSVGResourceType resourceType() const = 0;
 
   bool isSVGPaintServer() const {
     LayoutSVGResourceType resourceType = this->resourceType();
     return resourceType == PatternResourceType ||
            resourceType == LinearGradientResourceType ||
            resourceType == RadialGradientResourceType;
   }
 
@@ skipping 55 matching lines @@
                                 isSVGResourceContainer());
 
 #define DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(thisType, typeName)   \
   DEFINE_TYPE_CASTS(thisType, LayoutSVGResourceContainer, resource, \
                     resource->resourceType() == typeName,           \
                     resource.resourceType() == typeName)
 
 }  // namespace blink
 
 #endif