Remove disk_cache::BackendImpl::OpenPrevEntry() and all users.

net/disk_cache/blockfile/in_flight_backend_io.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_BLOCKFILE_IN_FLIGHT_BACKEND_IO_H_
 #define NET_DISK_CACHE_BLOCKFILE_IN_FLIGHT_BACKEND_IO_H_
 
 #include <list>
 #include <string>
 
@@ skipping 38 matching lines @@
   // The operations we proxy:
   void Init();
   void OpenEntry(const std::string& key, Entry** entry);
   void CreateEntry(const std::string& key, Entry** entry);
   void DoomEntry(const std::string& key);
   void DoomAllEntries();
   void DoomEntriesBetween(const base::Time initial_time,
                           const base::Time end_time);
   void DoomEntriesSince(const base::Time initial_time);
   void OpenNextEntry(void** iter, Entry** next_entry);
-  void OpenPrevEntry(void** iter, Entry** prev_entry);
   void EndEnumeration(void* iterator);
   void OnExternalCacheHit(const std::string& key);
   void CloseEntryImpl(EntryImpl* entry);
   void DoomEntryImpl(EntryImpl* entry);
   void FlushQueue();  // Dummy operation.
   void RunTask(const base::Closure& task);
   void ReadData(EntryImpl* entry, int index, int offset, net::IOBuffer* buf,
                 int buf_len);
   void WriteData(EntryImpl* entry, int index, int offset, net::IOBuffer* buf,
                  int buf_len, bool truncate);
@@ skipping 14 matching lines @@
   enum Operation {
     OP_NONE = 0,
     OP_INIT,
     OP_OPEN,
     OP_CREATE,
     OP_DOOM,
     OP_DOOM_ALL,
     OP_DOOM_BETWEEN,
     OP_DOOM_SINCE,
     OP_OPEN_NEXT,
-    OP_OPEN_PREV,
     OP_END_ENUMERATION,
     OP_ON_EXTERNAL_CACHE_HIT,
     OP_CLOSE_ENTRY,
     OP_DOOM_ENTRY,
     OP_FLUSH_QUEUE,
     OP_RUN_TASK,
     OP_MAX_BACKEND,
     OP_READ,
     OP_WRITE,
     OP_READ_SPARSE,
@@ skipping 56 matching lines @@
   void DoomEntry(const std::string& key,
                  const net::CompletionCallback& callback);
   void DoomAllEntries(const net::CompletionCallback& callback);
   void DoomEntriesBetween(const base::Time initial_time,
                           const base::Time end_time,
                           const net::CompletionCallback& callback);
   void DoomEntriesSince(const base::Time initial_time,
                         const net::CompletionCallback& callback);
   void OpenNextEntry(void** iter, Entry** next_entry,
                      const net::CompletionCallback& callback);
-  void OpenPrevEntry(void** iter, Entry** prev_entry,
-                     const net::CompletionCallback& callback);
   void EndEnumeration(void* iterator);
   void OnExternalCacheHit(const std::string& key);
   void CloseEntryImpl(EntryImpl* entry);
   void DoomEntryImpl(EntryImpl* entry);
   void FlushQueue(const net::CompletionCallback& callback);
   void RunTask(const base::Closure& task,
                const net::CompletionCallback& callback);
   void ReadData(EntryImpl* entry, int index, int offset, net::IOBuffer* buf,
                 int buf_len, const net::CompletionCallback& callback);
   void WriteData(
@@ skipping 33 matching lines @@
   BackendImpl* backend_;
   scoped_refptr<base::SingleThreadTaskRunner> background_thread_;
   base::WeakPtrFactory<InFlightBackendIO> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InFlightBackendIO);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BLOCKFILE_IN_FLIGHT_BACKEND_IO_H_