x/ref: make use of ctx arg to Lookup.

Change-Id: Ia6649ef0d5469a22843728fc5e350e8c891f2e72
diff --git a/runtime/factories/roaming/roaming.go b/runtime/factories/roaming/roaming.go
index 9dd781e..f42d786 100644
--- a/runtime/factories/roaming/roaming.go
+++ b/runtime/factories/roaming/roaming.go
@@ -62,7 +62,7 @@
 		Addrs: rpc.ListenAddrs(lf.Addrs),
 		Proxy: lf.ListenProxy,
 	}
-	reservedDispatcher := debuglib.NewDispatcher(logger.Manager(logger.Global()).LogDir, securityflag.NewAuthorizerOrDie())
+	reservedDispatcher := debuglib.NewDispatcher(securityflag.NewAuthorizerOrDie())
 
 	ac := appcycle.New()