Cache-aware Resource loading

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
@@ skipping 292 matching lines @@
 
   void addToEncodedBodyLength(int value) {
     m_response.addToEncodedBodyLength(value);
   }
   void addToDecodedBodyLength(int value) {
     m_response.addToDecodedBodyLength(value);
   }
 
   virtual bool canReuse(const ResourceRequest&) const { return true; }
 
+  // If cache-aware loading is activated, this callback is called when the first
+  // disk-cache-only request failed due to cache miss. After this callback,
+  // cache-aware loading is deactivated and a reload with original request will
+  // be triggered right away in ResourceLoader.
+  virtual void willReloadAfterDiskCacheMiss() {}
+
+  // TODO(shaochuan): This is for saving back the actual ResourceRequest sent
+  // in ResourceFetcher::startLoad() for retry in cache-aware loading, remove
+  // once ResourceRequest is not modified in startLoad(). crbug.com/632580
+  void setResourceRequest(const ResourceRequest& resourceRequest) {
+    m_resourceRequest = resourceRequest;
+  }
+
   // Used by the MemoryCache to reduce the memory consumption of the entry.
   void prune();
 
   virtual void onMemoryDump(WebMemoryDumpLevelOfDetail,
                             WebProcessMemoryDump*) const;
 
   static const char* resourceTypeToString(Type, const FetchInitiatorInfo&);
 
  protected:
   Resource(const ResourceRequest&, Type, const ResourceLoaderOptions&);
@@ skipping 158 matching lines @@
 };
 
 #define DEFINE_RESOURCE_TYPE_CASTS(typeName)                   \
   DEFINE_TYPE_CASTS(typeName##Resource, Resource, resource,    \
                     resource->getType() == Resource::typeName, \
                     resource.getType() == Resource::typeName);
 
 }  // namespace blink
 
 #endif