Disk cache: Add support for an extra data stream for each cache entry....

net/disk_cache/backend_impl.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_BACKEND_IMPL_H__
 #define NET_DISK_CACHE_BACKEND_IMPL_H__
 
 #include "base/compiler_specific.h"
@@ skipping 50 matching lines @@
   bool CreateExternalFile(Addr* address);
 
   // Creates a new storage block of size block_count.
   bool CreateBlock(FileType block_type, int block_count,
                    Addr* block_address);
 
   // Deletes a given storage block. deep set to true can be used to zero-fill
   // the related storage in addition of releasing the related block.
   void DeleteBlock(Addr block_address, bool deep);
 
+  // Retrieves a pointer to the lru-related data.
+  LruData* GetLruData();
+
   // Updates the ranking information for an entry.
   void UpdateRank(CacheRankingsBlock* node, bool modified);
 
   // A node was recovered from a crash, it may not be on the index, so this
   // method checks it and takes the appropriate action.
   void RecoveredEntry(CacheRankingsBlock* rankings);
 
   // Permanently deletes an entry.
   void InternalDoomEntry(EntryImpl* entry);
 
@@ skipping 111 matching lines @@
   TraceObject trace_object_;  // Inits and destroys internal tracing.
   ScopedRunnableMethodFactory<BackendImpl> factory_;
 
   DISALLOW_EVIL_CONSTRUCTORS(BackendImpl);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BACKEND_IMPL_H__