Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/android/foreign_session_helper.h

 // Copyright 2013 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_ANDROID_FOREIGN_SESSION_HELPER_H_
 #define CHROME_BROWSER_ANDROID_FOREIGN_SESSION_HELPER_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 30 matching lines @@
       const base::android::JavaParamRef<jobject>& j_tab,
       const base::android::JavaParamRef<jstring>& session_tag,
       jint tab_id,
       jint disposition);
   void DeleteForeignSession(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jstring>& session_tag);
 
   // syncer::SyncServiceObserver implementation
-  void OnStateChanged() override {}
-  void OnSyncConfigurationCompleted() override;
-  void OnForeignSessionUpdated() override;
+  void OnSyncConfigurationCompleted(syncer::SyncService* sync) override;
+  void OnForeignSessionUpdated(syncer::SyncService* sync) override;
 
   static bool RegisterForeignSessionHelper(JNIEnv* env);
 
  private:
   ~ForeignSessionHelper() override;
 
   // Fires |callback_| if it is not null.
   void FireForeignSessionCallback();
 
   Profile* profile_;  // weak
   base::android::ScopedJavaGlobalRef<jobject> callback_;
   ScopedObserver<syncer::SyncService, syncer::SyncServiceObserver>
       scoped_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ForeignSessionHelper);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_FOREIGN_SESSION_HELPER_H_