Inform disk cache of WebKit memory cache hits.

net/disk_cache/backend_impl.h

 // Copyright (c) 2011 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_
 #pragma once
 
@@ skipping 61 matching lines @@
   int SyncOpenEntry(const std::string& key, Entry** entry);
   int SyncCreateEntry(const std::string& key, Entry** entry);
   int SyncDoomEntry(const std::string& key);
   int SyncDoomAllEntries();
   int SyncDoomEntriesBetween(const base::Time initial_time,
                              const base::Time end_time);
   int SyncDoomEntriesSince(const base::Time initial_time);
   int SyncOpenNextEntry(void** iter, Entry** next_entry);
   int SyncOpenPrevEntry(void** iter, Entry** prev_entry);
   void SyncEndEnumeration(void* iter);
+  void SyncOnExternalCacheHit(const std::string& key);
 
   // Open or create an entry for the given |key| or |iter|.
   EntryImpl* OpenEntryImpl(const std::string& key);
   EntryImpl* CreateEntryImpl(const std::string& key);
   EntryImpl* OpenNextEntryImpl(void** iter);
   EntryImpl* OpenPrevEntryImpl(void** iter);
 
   // Sets the maximum size for the total amount of data stored by this instance.
   bool SetMaxSize(int max_bytes);
 
@@ skipping 164 matching lines @@
   virtual int DoomAllEntries(CompletionCallback* callback);
   virtual int DoomEntriesBetween(const base::Time initial_time,
                                  const base::Time end_time,
                                  CompletionCallback* callback);
   virtual int DoomEntriesSince(const base::Time initial_time,
                                CompletionCallback* callback);
   virtual int OpenNextEntry(void** iter, Entry** next_entry,
                             CompletionCallback* callback);
   virtual void EndEnumeration(void** iter);
   virtual void GetStats(StatsItems* stats);
+  virtual void OnExternalCacheHit(const std::string& key);
 
  private:
   typedef base::hash_map<CacheAddr, EntryImpl*> EntriesMap;
 
   // Creates a new backing file for the cache index.
   bool CreateBackingStore(disk_cache::File* file);
   bool InitBackingStore(bool* file_created);
   void AdjustMaxCacheSize(int table_len);
 
   // Deletes the cache and starts again.
@@ skipping 103 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BackendImpl);
 };
 
 // Returns the prefered max cache size given the available disk space.
 NET_TEST int PreferedCacheSize(int64 available);
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BACKEND_IMPL_H_