Revert of Remove void** from disk_cache interface.

net/disk_cache/memory/mem_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_MEMORY_MEM_BACKEND_IMPL_H_
 #define NET_DISK_CACHE_MEMORY_MEM_BACKEND_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
-#include "base/memory/weak_ptr.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/memory/mem_rankings.h"
 
 namespace net {
 class NetLog;
 }  // namespace net
 
 namespace disk_cache {
 
 class MemEntryImpl;
@@ skipping 47 matching lines @@
   virtual int CreateEntry(const std::string& key, Entry** entry,
                           const CompletionCallback& callback) OVERRIDE;
   virtual int DoomEntry(const std::string& key,
                         const CompletionCallback& callback) OVERRIDE;
   virtual int DoomAllEntries(const CompletionCallback& callback) OVERRIDE;
   virtual int DoomEntriesBetween(base::Time initial_time,
                                  base::Time end_time,
                                  const CompletionCallback& callback) OVERRIDE;
   virtual int DoomEntriesSince(base::Time initial_time,
                                const CompletionCallback& callback) OVERRIDE;
-  virtual scoped_ptr<Iterator> CreateIterator() OVERRIDE;
+  virtual int OpenNextEntry(void** iter, Entry** next_entry,
+                            const CompletionCallback& callback) OVERRIDE;
+  virtual void EndEnumeration(void** iter) OVERRIDE;
   virtual void GetStats(
       std::vector<std::pair<std::string, std::string> >* stats) OVERRIDE {}
   virtual void OnExternalCacheHit(const std::string& key) OVERRIDE;
 
  private:
-  class MemIterator;
-  friend class MemIterator;
-
   typedef base::hash_map<std::string, MemEntryImpl*> EntryMap;
 
   // Old Backend interface.
   bool OpenEntry(const std::string& key, Entry** entry);
   bool CreateEntry(const std::string& key, Entry** entry);
   bool DoomEntry(const std::string& key);
   bool DoomAllEntries();
   bool DoomEntriesBetween(const base::Time initial_time,
                           const base::Time end_time);
   bool DoomEntriesSince(const base::Time initial_time);
+  bool OpenNextEntry(void** iter, Entry** next_entry);
 
   // 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);
 
   // Handles the used storage count.
   void AddStorageSize(int32 bytes);
   void SubstractStorageSize(int32 bytes);
 
   EntryMap entries_;
   MemRankings rankings_;  // Rankings to be able to trim the cache.
   int32 max_size_;        // Maximum data size for this instance.
   int32 current_size_;
 
   net::NetLog* net_log_;
 
-  base::WeakPtrFactory<MemBackendImpl> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(MemBackendImpl);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_MEMORY_MEM_BACKEND_IMPL_H_