Add shutdown notification and service refs to SyncServiceObserver.

chrome/browser/extensions/external_pref_loader.cc

Index: chrome/browser/extensions/external_pref_loader.cc
diff --git a/chrome/browser/extensions/external_pref_loader.cc b/chrome/browser/extensions/external_pref_loader.cc
index 1d257b23a7c1e480860e363ffd4311e5bf0e4583..971aae56b8017802bb120a5c7acff46489b87b5d 100644
--- a/chrome/browser/extensions/external_pref_loader.cc
+++ b/chrome/browser/extensions/external_pref_loader.cc
@@ -154,7 +154,7 @@ void ExternalPrefLoader::OnIsSyncingChanged() {
   PostLoadIfPrioritySyncReady();
 }
 
-void ExternalPrefLoader::OnStateChanged() {
+void ExternalPrefLoader::OnStateChanged(syncer::SyncService* sync) {
   browser_sync::ProfileSyncService* service =

[skym, 2017/01/26 23:43:22]

This variable can be replaced by |sync|.

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

Done.

       ProfileSyncServiceFactory::GetForProfile(profile_);
   DCHECK(service);

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

I'd remove the DCHECK as well while you're in here.

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

Done.