Do not reload in ImageResource::fetch()

third_party/WebKit/Source/core/loader/resource/ImageResource.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 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 61 matching lines @@
 
   void reloadIfLoFiOrPlaceholderImage(ResourceFetcher*,
                                       ReloadLoFiOrPlaceholderPolicy);
 
   void didAddClient(ResourceClient*) override;
 
   ResourcePriority priorityFromObservers() override;
 
   void allClientsAndObserversRemoved() override;
 
+  bool canReuse(const FetchRequest&) const override;
+
   PassRefPtr<const SharedBuffer> resourceBuffer() const override;
   void appendData(const char*, size_t) override;
   void error(const ResourceError&) override;
   void responseReceived(const ResourceResponse&,
                         std::unique_ptr<WebDataConsumerHandle>) override;
   void finish(double finishTime = 0.0) override;
 
   // For compatibility, images keep loading even if there are HTTP errors.
   bool shouldIgnoreHTTPStatusCodeErrors() const override { return true; }
 
@@ skipping 76 matching lines @@
 
   Timer<ImageResource> m_flushTimer;
   double m_lastFlushTime = 0.;
 };
 
 DEFINE_RESOURCE_TYPE_CASTS(Image);
 
 }  // namespace blink
 
 #endif