Create a new disk_cache type, SHADER_CACHE.

net/disk_cache/backend_impl.h

 // Copyright (c) 2012 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/file_path.h"
@@ skipping 99 matching lines @@
                    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 UpdateRankOnCacheHit(EntryImpl* entry, bool modified);
+
+  // Updates the ranking information for an entry.
   void UpdateRank(EntryImpl* entry, 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, but still keeps track of it.
   void InternalDoomEntry(EntryImpl* entry);
 
 #if defined(NET_BUILD_STRESS_CACHE)
@@ skipping 264 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BackendImpl);
 };
 
 // Returns the preferred max cache size given the available disk space.
 NET_EXPORT_PRIVATE int PreferedCacheSize(int64 available);
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BACKEND_IMPL_H_