LogDog: Support per-namespace expired archival.

appengine/logdog/coordinator/service.go

Index: appengine/logdog/coordinator/service.go
diff --git a/appengine/logdog/coordinator/service.go b/appengine/logdog/coordinator/service.go
index fad11a4e4da0f3f3c3b6936a53b6ac6b9e122745..6481100d5171085b2c0e1b685b7b42111bb1c199 100644
--- a/appengine/logdog/coordinator/service.go
+++ b/appengine/logdog/coordinator/service.go
@@ -59,11 +59,17 @@ type Services interface {
 // instance into its Context.
 func WithProdServices(h middleware.Handler) middleware.Handler {
 	return func(c context.Context, rw http.ResponseWriter, r *http.Request, params httprouter.Params) {
-		c = WithServices(c, &prodServices{})
+		c = UseProdServices(c)
 		h(c, rw, r, params)
 	}
 }
 
+// UseProdServices installs production Services instance into the supplied
+// Context.
+func UseProdServices(c context.Context) context.Context {
+	return WithServices(c, &prodServices{})
+}
+
 // Request is a Service context for a given request.
 type prodServices struct {
 	sync.Mutex