Make Resource RefCountedWillBeGarbageCollectedFinalized, attempt #2

third_party/WebKit/Source/core/style/StyleFetchedImage.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. 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.
@@ skipping 35 matching lines @@
 StyleFetchedImage::~StyleFetchedImage()
 {
 #if !ENABLE(OILPAN)
     dispose();
 #endif
 }
 
 void StyleFetchedImage::dispose()
 {
     m_image->removeClient(this);
+    m_image = nullptr;
 }
 
 WrappedImagePtr StyleFetchedImage::data() const
 {
     return m_image.get();
 }
 
 ImageResource* StyleFetchedImage::cachedImage() const
 {
     return m_image.get();
@@ skipping 71 matching lines @@
 }
 
 bool StyleFetchedImage::knownToBeOpaque(const LayoutObject* layoutObject) const
 {
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data", InspectorPaintImageEvent::data(layoutObject, *m_image.get()));
     return m_image->image()->currentFrameKnownToBeOpaque(Image::PreCacheMetadata);
 }
 
 DEFINE_TRACE(StyleFetchedImage)
 {
+    visitor->trace(m_image);
     visitor->trace(m_document);
     StyleImage::trace(visitor);
 }
 
 } // namespace blink