Bug 579604 - Save prefs file after setting up Sync; r=gps

services/sync/modules/policies.js

@@ -193,6 +193,7 @@ let SyncScheduler = {
         }
         break;
       case "weave:service:setup-complete":
+         Services.prefs.savePrefFile(null);
          Svc.Idle.addIdleObserver(this, Svc.Prefs.get("scheduler.idleTime"));
          break;
       case "weave:service:start-over":