Revert changes made to ImageResource memory accounting at crrev.com/2337733002

third_party/WebKit/Source/core/fetch/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 110 matching lines @@
 
   void allClientsAndObserversRemoved() 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;
 
-  void onMemoryDump(WebMemoryDumpLevelOfDetail,
-                    WebProcessMemoryDump*) const override;
-
   // For compatibility, images keep loading even if there are HTTP errors.
   bool shouldIgnoreHTTPStatusCodeErrors() const override { return true; }
 
   bool isImage() const override { return true; }
 
   // ImageObserver
   void decodedSizeChangedTo(const blink::Image*, size_t newSize) override;
   void didDraw(const blink::Image*) override;
 
   bool shouldPauseAnimation(const blink::Image*) override;
@@ skipping 60 matching lines @@
   bool m_hasDevicePixelRatioHeaderValue;
   HashCountedSet<ImageResourceObserver*> m_observers;
   HashCountedSet<ImageResourceObserver*> m_finishedObservers;
 };
 
 DEFINE_RESOURCE_TYPE_CASTS(Image);
 
 }  // namespace blink
 
 #endif