Remove deprecated ms arguments for Timer and Future.

tests/standalone/io/secure_server_socket_test.dart

Index: tests/standalone/io/secure_server_socket_test.dart
diff --git a/tests/standalone/io/secure_server_socket_test.dart b/tests/standalone/io/secure_server_socket_test.dart
index cadabf39db211df2ee2261257f3dcca3ec983d65..455cf7d15a8d819ae07e0e7ff79bcc6437dbd01a 100644
--- a/tests/standalone/io/secure_server_socket_test.dart
+++ b/tests/standalone/io/secure_server_socket_test.dart
@@ -119,7 +119,7 @@ void testServerListenAfterConnect() {
   SecureServerSocket.bind(SERVER_ADDRESS, 0, 5, CERTIFICATE).then((server) {
     Expect.isTrue(server.port > 0);
     var clientEndFuture = SecureSocket.connect(HOST_NAME, server.port);
-    new Timer(500, (_) {
+    new Timer(const Duration(milliseconds: 500), () {
       server.listen((serverEnd) {
         clientEndFuture.then((clientEnd) {
           clientEnd.close();