Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/sync/test/integration/p2p_invalidation_forwarder.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 CHROME_BROWSER_SYNC_TEST_INTEGRATION_P2P_INVALIDATION_FORWARDER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_P2P_INVALIDATION_FORWARDER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/sync/driver/sync_service_observer.h"
@@ skipping 14 matching lines @@
 // It register and unregisters in its constructor and destructor.  This is
 // intended to make it easy to manage with a scoped_ptr.
 class P2PInvalidationForwarder : public syncer::SyncServiceObserver {
  public:
   P2PInvalidationForwarder(
       browser_sync::ProfileSyncService* sync_service,
       invalidation::P2PInvalidationService* invalidation_service);
   ~P2PInvalidationForwarder() override;
 
   // Implementation of syncer::SyncServiceObserver
-  void OnStateChanged() override;
-  void OnSyncCycleCompleted() override;
+  void OnSyncCycleCompleted(syncer::SyncService* sync) override;
 
  private:
   browser_sync::ProfileSyncService* sync_service_;
   invalidation::P2PInvalidationService* invalidation_service_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PInvalidationForwarder);
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_P2P_INVALIDATION_FORWARDER_H_