Disable sync for Lightspeed experimentation.

chrome/browser/supervised_user/supervised_user_service.h

Index: chrome/browser/supervised_user/supervised_user_service.h
diff --git a/chrome/browser/supervised_user/supervised_user_service.h b/chrome/browser/supervised_user/supervised_user_service.h
index 8b16b444a0875752654da385048645ae6778b8d7..25542d05136b9255f27553d585b6a8eb14ce3073 100644
--- a/chrome/browser/supervised_user/supervised_user_service.h
+++ b/chrome/browser/supervised_user/supervised_user_service.h
@@ -33,6 +33,7 @@ class Browser;
 class GoogleServiceAuthError;
 class PermissionRequestCreator;
 class Profile;
+class ProfileSyncService;
 class SupervisedUserBlacklistDownloader;
 class SupervisedUserRegistrationUtility;
 class SupervisedUserServiceObserver;
@@ -333,6 +334,9 @@ class SupervisedUserService : public KeyedService,
 
   PrefChangeRegistrar pref_change_registrar_;
 
+  // May be null in tests or due to command line flag.
+  ProfileSyncService* profile_sync_service_;  // owned by BCKS factory.

[Alexei Svitkine (slow), 2015/02/19 22:04:08]

Nit: If you already have a comment above, merge this comment into it. Also, use
full sentences.

[Mike Lerman, 2015/02/20 16:38:01]

It is my humblest pleasure to use the fullest and most complete of sentences. Ok
GR8 CU L8R.

+
   // True iff we're waiting for the Sync service to be initialized.
   bool waiting_for_sync_initialization_;
   bool is_profile_active_;