Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/sync/test/integration/multi_client_status_change_checker.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_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 14 matching lines @@
                                        public syncer::SyncServiceObserver {
  public:
   explicit MultiClientStatusChangeChecker(
       std::vector<browser_sync::ProfileSyncService*> services);
   ~MultiClientStatusChangeChecker() override;
 
   // Called when waiting times out.
   void OnTimeout();
 
   // syncer::SyncServiceObserver implementation.
-  void OnStateChanged() override;
+  void OnStateChanged(syncer::SyncService* sync) override;
 
   // StatusChangeChecker implementations and stubs.
   bool IsExitConditionSatisfied() override = 0;
   std::string GetDebugMessage() const override = 0;
 
  protected:
   const std::vector<browser_sync::ProfileSyncService*>& services() {
     return services_;
   }
 
  private:
   std::vector<browser_sync::ProfileSyncService*> services_;
   ScopedObserver<browser_sync::ProfileSyncService,
                  MultiClientStatusChangeChecker>
       scoped_observer_;
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_MULTI_CLIENT_STATUS_CHANGE_CHECKER_H_