Track entries pending Doom in SimpleCache backend.

net/disk_cache/simple/simple_entry_impl.h

 // Copyright (c) 2013 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_SIMPLE_SIMPLE_ENTRY_IMPL_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_IMPL_H_
 
 #include <queue>
 #include <string>
 
@@ skipping 199 matching lines @@
                              scoped_ptr<base::Time> last_used,
                              scoped_ptr<int> result);
 
   // Called after an asynchronous write completes.
   void WriteOperationComplete(int stream_index,
                               const CompletionCallback& completion_callback,
                               scoped_ptr<SimpleEntryStat> entry_stat,
                               scoped_ptr<int> result);
 
   // Called after an asynchronous doom completes.
-  void DoomOperationComplete(const CompletionCallback& callback,
+  void DoomOperationComplete(const base::WeakPtr<SimpleBackendImpl>& backend,
+                             const CompletionCallback& callback,
                              State state_to_restore,
                              int result);
 
   // Called after validating the checksums on an entry. Passes through the
   // original result if successful, propogates the error if the checksum does
   // not validate.
   void ChecksumOperationComplete(
       int stream_index,
       int orig_result,
       const CompletionCallback& completion_callback,
@@ skipping 57 matching lines @@
   std::queue<SimpleEntryOperation> pending_operations_;
 
   net::BoundNetLog net_log_;
 
   scoped_ptr<SimpleEntryOperation> executing_operation_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_IMPL_H_