Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc

 // 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.
 
 #include "chrome/browser/sync/test/integration/p2p_invalidation_forwarder.h"
 
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/invalidation/impl/p2p_invalidation_service.h"
 #include "components/sync/base/invalidation_helper.h"
 #include "components/sync/engine/cycle/sync_cycle_snapshot.h"
 
 P2PInvalidationForwarder::P2PInvalidationForwarder(
     browser_sync::ProfileSyncService* sync_service,
     invalidation::P2PInvalidationService* invalidation_service)
     : sync_service_(sync_service), invalidation_service_(invalidation_service) {
   sync_service_->AddObserver(this);
 }
 
 P2PInvalidationForwarder::~P2PInvalidationForwarder() {
   sync_service_->RemoveObserver(this);
 }
 
-void P2PInvalidationForwarder::OnStateChanged() {}
-
-void P2PInvalidationForwarder::OnSyncCycleCompleted() {
+void P2PInvalidationForwarder::OnSyncCycleCompleted(syncer::SyncService* sync) {
   const syncer::SyncCycleSnapshot& snap = sync_service_->GetLastCycleSnapshot();
   bool is_notifiable_commit =
       (snap.model_neutral_state().num_successful_commits > 0);
   if (is_notifiable_commit && invalidation_service_) {
     syncer::ModelTypeSet model_types =
         snap.model_neutral_state().commit_request_types;
     syncer::ObjectIdSet ids = ModelTypeSetToObjectIdSet(model_types);
     invalidation_service_->SendInvalidation(ids);
   }
 }