[Sync] Avoid unregistering object IDs on shutdown

sync/notifier/p2p_notifier.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.
 //
 // A notifier that uses p2p notifications based on XMPP push
 // notifications.  Used only for sync integration tests.
 
 #ifndef SYNC_NOTIFIER_P2P_NOTIFIER_H_
 #define SYNC_NOTIFIER_P2P_NOTIFIER_H_
 
@@ skipping 78 matching lines @@
   // self-notifications in some cases, but not others.  The value should be
   // either NOTIFY_ALL to send notifications to all clients, or NOTIFY_OTHERS
   // to send notifications to all clients except for the one that triggered the
   // notification.  See crbug.com/97780.
   P2PNotifier(scoped_ptr<notifier::PushClient> push_client,
               P2PNotificationTarget send_notification_target);
 
   virtual ~P2PNotifier();
 
   // SyncNotifier implementation
-  virtual void UpdateRegisteredIds(SyncNotifierObserver* handler,
+  virtual void SetHandler(const std::string& handler_name,
+                          SyncNotifierObserver* handler) OVERRIDE;
+  virtual void UpdateRegisteredIds(const std::string& handler_name,
                                    const ObjectIdSet& ids) OVERRIDE;
   virtual void SetUniqueId(const std::string& unique_id) OVERRIDE;
   virtual void SetStateDeprecated(const std::string& state) OVERRIDE;
   virtual void UpdateCredentials(
       const std::string& email, const std::string& token) OVERRIDE;
   virtual void SendNotification(ModelTypeSet changed_types) OVERRIDE;
 
   // PushClientObserver implementation.
   virtual void OnNotificationsEnabled() OVERRIDE;
   virtual void OnNotificationsDisabled(
@@ skipping 20 matching lines @@
   bool notifications_enabled_;
   // Which set of clients should be sent notifications.
   P2PNotificationTarget send_notification_target_;
 
   ModelTypeSet enabled_types_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_P2P_NOTIFIER_H_