DOM-based SVG resource tracking

third_party/WebKit/Source/core/layout/svg/SVGResources.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 11 matching lines @@
 
 #include <memory>
 #include "platform/wtf/Allocator.h"
 #include "platform/wtf/HashSet.h"
 #include "platform/wtf/Noncopyable.h"
 #include "platform/wtf/PtrUtil.h"
 
 namespace blink {
 
 class ComputedStyle;
+class Element;
 class LayoutObject;
 class LayoutSVGResourceClipper;
 class LayoutSVGResourceContainer;
 class LayoutSVGResourceFilter;
 class LayoutSVGResourceMarker;
 class LayoutSVGResourceMasker;
 class LayoutSVGResourcePaintServer;
 class SVGElement;
 
 // Holds a set of resources associated with a LayoutObject
 class SVGResources {
   WTF_MAKE_NONCOPYABLE(SVGResources);
   USING_FAST_MALLOC(SVGResources);
 
  public:
   SVGResources();
 
   static std::unique_ptr<SVGResources> BuildResources(const LayoutObject*,
                                                       const ComputedStyle&);
+
+  static void RemoveWatchesForElement(Element&);
+  static void RemoveUnreferencedResources(const LayoutObject&);
+
   void LayoutIfNeeded();
 
   static bool SupportsMarkers(const SVGElement&);
 
   // Ordinary resources
   LayoutSVGResourceClipper* Clipper() const {
     return clipper_filter_masker_data_ ? clipper_filter_masker_data_->clipper
                                        : 0;
   }
   LayoutSVGResourceMarker* MarkerStart() const {
@@ skipping 119 matching lines @@
 
   std::unique_ptr<ClipperFilterMaskerData> clipper_filter_masker_data_;
   std::unique_ptr<MarkerData> marker_data_;
   std::unique_ptr<FillStrokeData> fill_stroke_data_;
   LayoutSVGResourceContainer* linked_resource_;
 };
 
 }  // namespace blink
 
 #endif