[Sync] Avoid unregistering object IDs on shutdown

sync/tools/sync_listen_notifications.cc

 // 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.
 
+#include <cstddef>
 #include <cstdio>
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 220 matching lines @@
   SyncNotifierFactory sync_notifier_factory(
       notifier_options, kClientInfo,
       null_invalidation_state_tracker.AsWeakPtr());
   scoped_ptr<SyncNotifier> sync_notifier(
       sync_notifier_factory.CreateSyncNotifier());
   NotificationPrinter notification_printer;
 
   const char kUniqueId[] = "fake_unique_id";
   sync_notifier->SetUniqueId(kUniqueId);
   sync_notifier->UpdateCredentials(email, token);
+
   // Listen for notifications for all known types.
+  sync_notifier->RegisterHandler(&notification_printer);
   sync_notifier->UpdateRegisteredIds(
       &notification_printer, ModelTypeSetToObjectIdSet(ModelTypeSet::All()));
 
   ui_loop.Run();
 
-  sync_notifier->UpdateRegisteredIds(&notification_printer, ObjectIdSet());
+  sync_notifier->UnregisterHandler(&notification_printer);
   io_thread.Stop();
   return 0;
 }
 
 }  // namespace
 }  // namespace syncer
 
 int main(int argc, char* argv[]) {
   return syncer::SyncListenNotificationsMain(argc, argv);
 }