Remove deprecated ms arguments for Timer and Future.

tests/standalone/io/raw_secure_server_socket_test.dart

Index: tests/standalone/io/raw_secure_server_socket_test.dart
diff --git a/tests/standalone/io/raw_secure_server_socket_test.dart b/tests/standalone/io/raw_secure_server_socket_test.dart
index 73609ae12d92f342808f92526f93ffd6bb9f4dae..ff29f770db20b02be29f1e82bbd1e3751ced01f8 100644
--- a/tests/standalone/io/raw_secure_server_socket_test.dart
+++ b/tests/standalone/io/raw_secure_server_socket_test.dart
@@ -120,7 +120,7 @@ void testServerListenAfterConnect() {
   RawSecureServerSocket.bind(SERVER_ADDRESS, 0, 5, CERTIFICATE).then((server) {
     Expect.isTrue(server.port > 0);
     var clientEndFuture = RawSecureSocket.connect(HOST_NAME, server.port);
-    new Timer(500, (_) {
+    new Timer(const Duration(milliseconds: 500), () {
       server.listen((serverEnd) {
         clientEndFuture.then((clientEnd) {
           clientEnd.shutdown(SocketDirection.SEND);