Disk cache: Add base files for implementation of file format version 3.

net/disk_cache/v3/eviction_v3.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.
 
 #ifndef NET_DISK_CACHE_EVICTION_H_
 #define NET_DISK_CACHE_EVICTION_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "net/disk_cache/disk_format.h"
@@ skipping 12 matching lines @@
   ~Eviction();
 
   void Init(BackendImpl* backend);
   void Stop();
 
   // Deletes entries from the cache until the current size is below the limit.
   // If empty is true, the whole cache will be trimmed, regardless of being in
   // use.
   void TrimCache(bool empty);
 
-  // Updates the ranking information for an entry.
-  void UpdateRank(EntryImpl* entry, bool modified);
-
   // Notifications of interesting events for a given entry.
   void OnOpenEntry(EntryImpl* entry);
   void OnCreateEntry(EntryImpl* entry);
-  void OnDoomEntry(EntryImpl* entry);
-  void OnDestroyEntry(EntryImpl* entry);
 
   // Testing interface.
   void SetTestMode();
   void TrimDeletedList(bool empty);
 
  private:
   void PostDelayedTrim();
   void DelayedTrim();
   bool ShouldTrim();
   bool ShouldTrimDeleted();
-  void ReportTrimTimes(EntryImpl* entry);
-  Rankings::List GetListForEntry(EntryImpl* entry);
   bool EvictEntry(CacheRankingsBlock* node, bool empty, Rankings::List list);
 
-  // We'll just keep for a while a separate set of methods that implement the
-  // new eviction algorithm. This code will replace the original methods when
-  // finished.
   void TrimCacheV2(bool empty);
-  void UpdateRankV2(EntryImpl* entry, bool modified);
-  void OnOpenEntryV2(EntryImpl* entry);
-  void OnCreateEntryV2(EntryImpl* entry);
-  void OnDoomEntryV2(EntryImpl* entry);
-  void OnDestroyEntryV2(EntryImpl* entry);
-  Rankings::List GetListForEntryV2(EntryImpl* entry);
   void TrimDeleted(bool empty);
-  bool RemoveDeletedNode(CacheRankingsBlock* node);
 
   bool NodeIsOldEnough(CacheRankingsBlock* node, int list);
   int SelectListByLength(Rankings::ScopedRankingsBlock* next);
   void ReportListStats();
 
   BackendImpl* backend_;
   Rankings* rankings_;
   IndexHeader* header_;
   int max_size_;
   int trim_delays_;
   int index_size_;
   bool new_eviction_;
   bool first_trim_;
   bool trimming_;
   bool delay_trim_;
   bool init_;
   bool test_mode_;
   base::WeakPtrFactory<Eviction> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Eviction);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_EVICTION_H_