Remove duplication of encoded image data

third_party/WebKit/Source/core/fetch/Resource.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, 2008, 2009, 2010, 2011 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.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef Resource_h
 #define Resource_h
 
 #include "core/CoreExport.h"
 #include "core/fetch/CachedMetadataHandler.h"
 #include "core/fetch/ResourceLoaderOptions.h"
+#include "platform/SharedBuffer.h"
 #include "platform/Timer.h"
 #include "platform/network/ResourceError.h"
 #include "platform/network/ResourceLoadPriority.h"
 #include "platform/network/ResourceRequest.h"
 #include "platform/network/ResourceResponse.h"
 #include "platform/scheduler/CancellableTaskFactory.h"
 #include "platform/web_process_memory_dump.h"
 #include "public/platform/WebDataConsumerHandle.h"
 #include "wtf/Allocator.h"
 #include "wtf/HashCountedSet.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/WTFString.h"
 #include <memory>
 
 namespace blink {
 
 struct FetchInitiatorInfo;
 class CachedMetadata;
 class FetchRequest;
 class ResourceClient;
 class ResourceTimingInfo;
 class ResourceLoader;
 class SecurityOrigin;
-class SharedBuffer;
 
 // A resource that is held in the cache. Classes who want to use this object should derive
 // from ResourceClient, to get the function calls in case the requested data has arrived.
 // This class also does the actual communication with the loader to obtain the resource from the network.
 class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource> {
     WTF_MAKE_NONCOPYABLE(Resource);
 public:
     // |Type| enum values are used in UMAs, so do not change the values of
     // existing |Type|. When adding a new |Type|, append it at the end and
     // update |kLastResourceType|.
@@ skipping 106 matching lines @@
     // Updates the expire date on the cache entry file
     virtual void finish(double finishTime);
     void finish() { finish(0.0); }
 
     // FIXME: Remove the stringless variant once all the callsites' error messages are updated.
     bool passesAccessControlCheck(SecurityOrigin*) const;
     bool passesAccessControlCheck(SecurityOrigin*, String& errorDescription) const;
 
     bool isEligibleForIntegrityCheck(SecurityOrigin*) const;
 
-    SharedBuffer* resourceBuffer() const { return m_data.get(); }
+    virtual PassRefPtr<SharedBuffer> resourceBuffer() const { return m_data; }
     void setResourceBuffer(PassRefPtr<SharedBuffer>);
 
     virtual void willFollowRedirect(ResourceRequest&, const ResourceResponse&);
 
     // Called when a redirect response was received but a decision has
     // already been made to not follow it.
     virtual void willNotFollowRedirect() {}
 
     virtual void responseReceived(const ResourceResponse&, std::unique_ptr<WebDataConsumerHandle>);
     void setResponse(const ResourceResponse&);
@@ skipping 181 matching lines @@
 
     Resource::Type m_type;
 };
 
 #define DEFINE_RESOURCE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName##Resource, Resource, resource, resource->getType() == Resource::typeName, resource.getType() == Resource::typeName);
 
 } // namespace blink
 
 #endif