Don't expose DocumentWriter to embedding layer

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.
@@ skipping 79 matching lines @@
         CacheLiveResourcePriorityHigh
     };
 
     virtual void load(ResourceFetcher*, const ResourceLoaderOptions&);
 
     virtual void setEncoding(const String&) { }
     virtual String encoding() const { return String(); }
     virtual void appendData(const char*, int);
     virtual void error(Resource::Status);
 
+    void setNeedsSynchronousCacheHit(bool needsSynchronousCacheHit) { m_needsSynchronousCacheHit = needsSynchronousCacheHit; }
+
     void setResourceError(const ResourceError& error) { m_error = error; }
     const ResourceError& resourceError() const { return m_error; }
 
     void setIdentifier(unsigned long identifier) { m_identifier = identifier; }
     unsigned long identifier() const { return m_identifier; }
 
     virtual bool shouldIgnoreHTTPStatusCodeErrors() const { return false; }
 
     ResourceRequest& resourceRequest() { return m_resourceRequest; }
     const KURL& url() const { return m_resourceRequest.url();}
@@ skipping 246 matching lines @@
     unsigned m_inCache : 1;
     unsigned m_loading : 1;
 
     unsigned m_switchingClientsToRevalidatedResource : 1;
 
     unsigned m_type : 4; // Type
     unsigned m_status : 3; // Status
 
     unsigned m_wasPurged : 1;
 
+    unsigned m_needsSynchronousCacheHit : 1;
+
 #ifndef NDEBUG
     bool m_deleted;
     unsigned m_lruIndex;
 #endif
 
     Resource* m_nextInAllResourcesList;
     Resource* m_prevInAllResourcesList;
 
     Resource* m_nextInLiveResourcesList;
     Resource* m_prevInLiveResourcesList;
@@ skipping 16 matching lines @@
 const char* ResourceTypeName(Resource::Type);
 #endif
 
 #define DEFINE_RESOURCE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName##Resource, Resource, resource, resource->type() == Resource::typeName, resource.type() == Resource::typeName); \
     inline typeName##Resource* to##typeName##Resource(const ResourcePtr<Resource>& ptr) { return to##typeName##Resource(ptr.get()); }
 
 }
 
 #endif