Make Resource RefCountedWillBeGarbageCollectedFinalized, attempt #2

third_party/WebKit/Source/core/svg/SVGFEImageElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2010 Dirk Schulze <krit@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.
  *
@@ skipping 29 matching lines @@
     addToPropertyMap(m_preserveAspectRatio);
 }
 
 DEFINE_NODE_FACTORY(SVGFEImageElement)
 
 SVGFEImageElement::~SVGFEImageElement()
 {
 #if ENABLE(OILPAN)
     if (m_cachedImage) {
         m_cachedImage->removeClient(this);
-        m_cachedImage = 0;
+        m_cachedImage = nullptr;
     }
 #else
     clearResourceReferences();
 #endif
 }
 
 DEFINE_TRACE(SVGFEImageElement)
 {
     visitor->trace(m_preserveAspectRatio);
+    visitor->trace(m_cachedImage);
     SVGFilterPrimitiveStandardAttributes::trace(visitor);
     SVGURIReference::trace(visitor);
 }
 
 bool SVGFEImageElement::currentFrameHasSingleSecurityOrigin() const
 {
     if (m_cachedImage && m_cachedImage->image())
         return m_cachedImage->image()->currentFrameHasSingleSecurityOrigin();
 
     return true;
 }
 
 void SVGFEImageElement::clearResourceReferences()
 {
     if (m_cachedImage) {
         m_cachedImage->removeClient(this);
-        m_cachedImage = 0;
+        m_cachedImage = nullptr;
     }
 
     removeAllOutgoingReferences();
 }
 
 void SVGFEImageElement::fetchImageResource()
 {
     FetchRequest request(ResourceRequest(ownerDocument()->completeURL(hrefString())), localName());
     m_cachedImage = ImageResource::fetch(request, document().fetcher());
 
@@ skipping 75 matching lines @@
         // Don't use the broken image icon on image loading errors.
         RefPtr<Image> image = m_cachedImage->errorOccurred() ?
             nullptr : m_cachedImage->image();
         return FEImage::createWithImage(filter, image, m_preserveAspectRatio->currentValue());
     }
 
     return FEImage::createWithIRIReference(filter, treeScope(), hrefString(), m_preserveAspectRatio->currentValue());
 }
 
 } // namespace blink