Flush Channel IDs when Cookies get saved to a persistent backend

net/extras/sqlite/sqlite_channel_id_store.h

 // Copyright 2014 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_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_
 #define NET_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_
 
 #include <list>
 #include <string>
 
@@ skipping 22 matching lines @@
       const base::FilePath& path,
       const scoped_refptr<base::SequencedTaskRunner>& background_task_runner);
 
   // DefaultChannelIDStore::PersistentStore:
   void Load(const LoadedCallback& loaded_callback) override;
   void AddChannelID(
       const DefaultChannelIDStore::ChannelID& channel_id) override;
   void DeleteChannelID(
       const DefaultChannelIDStore::ChannelID& channel_id) override;
   void SetForceKeepSessionState() override;
+  void Flush() override;
 
   // Delete channel ids from servers in |server_identifiers|.
   void DeleteAllInList(const std::list<std::string>& server_identifiers);
 
  private:
   ~SQLiteChannelIDStore() override;
 
   class Backend;
 
   scoped_refptr<Backend> backend_;
 
   DISALLOW_COPY_AND_ASSIGN(SQLiteChannelIDStore);
 };
 
 }  // namespace net
 
 #endif  // NET_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_