Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/android/foreign_session_helper.h

Index: chrome/browser/android/foreign_session_helper.h
diff --git a/chrome/browser/android/foreign_session_helper.h b/chrome/browser/android/foreign_session_helper.h
index b90e96f7694c2b09700e599413e954fd448ce63a..7819bc272348c65c2f0ba18c02202e5d3b50c4f7 100644
--- a/chrome/browser/android/foreign_session_helper.h
+++ b/chrome/browser/android/foreign_session_helper.h
@@ -48,9 +48,8 @@ class ForeignSessionHelper : public syncer::SyncServiceObserver {
       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);