Instantiate and destroy v4 update manager with IO thread start/stop.

components/safe_browsing_db/database_manager.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.
 //
 // The Safe Browsing service is responsible for downloading anti-phishing and
 // anti-malware tables and checking urls against them.
 
 #ifndef COMPONENTS_SAFE_BROWSING_DB_DATABASE_MANAGER_H_
 #define COMPONENTS_SAFE_BROWSING_DB_DATABASE_MANAGER_H_
 
@@ skipping 10 matching lines @@
 #include "url/gurl.h"
 
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace safe_browsing {
 
 struct V4ProtocolConfig;
 class V4GetHashProtocolManager;
+class V4UpdateProtocolManager;
 
 // Base class to either the locally-managed or a remotely-managed database.
 class SafeBrowsingDatabaseManager
     : public base::RefCountedThreadSafe<SafeBrowsingDatabaseManager> {
  public:
   // Callers requesting a result should derive from this class.
   // The destructor should call db_manager->CancelCheck(client) if a
   // request is still pending.
   class Client {
    public:
@@ skipping 129 matching lines @@
 
  protected:
   SafeBrowsingDatabaseManager();
 
   virtual ~SafeBrowsingDatabaseManager();
 
   friend class base::RefCountedThreadSafe<SafeBrowsingDatabaseManager>;
 
   // Created and destroyed via StartonIOThread/StopOnIOThread.
   V4GetHashProtocolManager* v4_get_hash_protocol_manager_;
+  V4UpdateProtocolManager* v4_update_protocol_manager_;
 };  // class SafeBrowsingDatabaseManager
 
 }  // namespace safe_browsing
 
 #endif  // COMPONENTS_SAFE_BROWSING_DB_DATABASE_MANAGER_H_