Skeleton of the overall design for the database for Pver4

components/safe_browsing_db/v4_local_database_manager.h

 // Copyright 2016 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 COMPONENTS_SAFE_BROWSING_DB_V4_LOCAL_DATABASE_MANAGER_H_
 #define COMPONENTS_SAFE_BROWSING_DB_V4_LOCAL_DATABASE_MANAGER_H_
 
 // A class that provides the interface between the SafeBrowsing protocol manager
 // and database that holds the downloaded updates.
 
 #include <memory>
 
 #include "components/safe_browsing_db/database_manager.h"
 #include "components/safe_browsing_db/hit_report.h"
+#include "components/safe_browsing_db/v4_database.h"
 #include "components/safe_browsing_db/v4_protocol_manager_util.h"
 #include "components/safe_browsing_db/v4_update_protocol_manager.h"
 #include "url/gurl.h"
 
 using content::ResourceType;
 
 namespace safe_browsing {
 
 // Manages the local, on-disk database of updates downloaded from the
 // SafeBrowsing service and interfaces with the protocol manager.
@@ skipping 37 matching lines @@
   ~V4LocalDatabaseManager() override;
 
   // The callback called each time the protocol manager downloads updates
   // successfully.
   void UpdateRequestCompleted(const std::vector<ListUpdateResponse>& responses);
 
   bool enabled_;
 
   // Stores the current status of the lists to download from the SafeBrowsing
   // servers.
+  // TODO(vakh): current_list_states_ doesn't really belong here.
+  // It should come through the database, from the various V4Stores.
   base::hash_map<UpdateListIdentifier, std::string> current_list_states_;
 
   // The protocol manager that downloads the hash prefix updates.
   std::unique_ptr<V4UpdateProtocolManager> v4_update_protocol_manager_;
 
+  // The database that manages the stores containing the hash prefix updates.
+  std::unique_ptr<V4Database> v4_database_;
+
   friend class base::RefCountedThreadSafe<V4LocalDatabaseManager>;
   DISALLOW_COPY_AND_ASSIGN(V4LocalDatabaseManager);
 };  // class V4LocalDatabaseManager
 
 }  // namespace safe_browsing
 
 #endif  // COMPONENTS_SAFE_BROWSING_DB_V4_LOCAL_DATABASE_MANAGER_H_