fixup! *: plug in no-op metric implementations for nil fields

Author: suj-krishnan

drpcconn/conn.go

@@ -60,7 +60,7 @@ func NewWithOptions(tr drpc.Transport, opts Options) *Conn {
 	}
 
 	if opts.CollectMetrics {
-		mt := drpcmetrics.NewMeteredTransport(tr, opts.Metrics.BytesSent,
+		mt := drpcmetrics.ToMeteredTransport(tr, opts.Metrics.BytesSent,
 			opts.Metrics.BytesRecv)
 		c.tr = mt
 	}

drpcmetrics/metrics.go

@@ -60,10 +60,10 @@ type meteredTransport struct {
 	bytesRecv Counter
 }
 
-// NewMeteredTransport returns a transport that increments bytesSent and
+// ToMeteredTransport returns a transport that increments bytesSent and
 // bytesRecv on each Write and Read call respectively. Nil counters are
 // replaced with no-op implementations.
-func NewMeteredTransport(tr drpc.Transport, bytesSent,
+func ToMeteredTransport(tr drpc.Transport, bytesSent,
 	bytesRecv Counter) drpc.Transport {
 	if bytesSent == nil {
 		bytesSent = NoOpCounter{}