Add shutdown notification and service refs to SyncServiceObserver.

ios/chrome/browser/sync/sync_observer_bridge.h

 // Copyright 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.
 
 #ifndef IOS_CHROME_BROWSER_SYNC_SYNC_OBSERVER_BRIDGE_H_
 #define IOS_CHROME_BROWSER_SYNC_SYNC_OBSERVER_BRIDGE_H_
 
 #include "base/compiler_specific.h"
 #include "base/ios/weak_nsobject.h"
 #include "base/macros.h"
@@ skipping 14 matching lines @@
 class SyncObserverBridge : public syncer::SyncServiceObserver {
  public:
   // |service| must outlive the SyncObserverBridge.
   SyncObserverBridge(id<SyncObserverModelBridge> delegate,
                      syncer::SyncService* service);
 
   ~SyncObserverBridge() override;
 
  private:
   // syncer::SyncServiceObserver implementation:
-  void OnStateChanged() override;
-  void OnSyncConfigurationCompleted() override;
+  void OnStateChanged(syncer::SyncService* sync) override;
+  void OnSyncConfigurationCompleted(syncer::SyncService* sync) override;
 
   base::WeakNSProtocol<id<SyncObserverModelBridge>> delegate_;
   ScopedObserver<syncer::SyncService, syncer::SyncServiceObserver>
       scoped_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncObserverBridge);
 };
 
 #endif  // IOS_CHROME_BROWSER_SYNC_SYNC_OBSERVER_BRIDGE_H_