Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/supervised_user/supervised_user_service.cc

Index: chrome/browser/supervised_user/supervised_user_service.cc
diff --git a/chrome/browser/supervised_user/supervised_user_service.cc b/chrome/browser/supervised_user/supervised_user_service.cc
index 324f525d62632145ea2ce299f1691c02c2797820..befacfaa44e0158e8b753c04c347856b7387a1a8 100644
--- a/chrome/browser/supervised_user/supervised_user_service.cc
+++ b/chrome/browser/supervised_user/supervised_user_service.cc
@@ -1257,7 +1257,7 @@ syncer::ModelTypeSet SupervisedUserService::GetPreferredDataTypes() const {
 }
 
 #if !defined(OS_ANDROID)
-void SupervisedUserService::OnStateChanged() {
+void SupervisedUserService::OnStateChanged(syncer::SyncService* sync) {
   browser_sync::ProfileSyncService* service =

[skym, 2017/01/26 23:43:23]

This variable can be replaced by |sync|.

[Steven Holte, 2017/01/27 02:27:19]

Done.

       ProfileSyncServiceFactory::GetForProfile(profile_);
   if (waiting_for_sync_initialization_ && service->IsEngineInitialized()) {