Remove deprecated ms arguments for Timer and Future.

tests/standalone/io/http_auth_test.dart

Index: tests/standalone/io/http_auth_test.dart
diff --git a/tests/standalone/io/http_auth_test.dart b/tests/standalone/io/http_auth_test.dart
index cfc692bb6e6e33c87521e5f8e07ec420ce2656a7..c6acccb688ccb5ad6cd641bc2f7da16cbf9bf7a4 100644
--- a/tests/standalone/io/http_auth_test.dart
+++ b/tests/standalone/io/http_auth_test.dart
@@ -168,7 +168,7 @@ void testBasicAuthenticateCallback() {
       String password = url.path.substring(1, 6);
       if (passwordChanged) password = "${password}1";
       Completer completer = new Completer();
-      new Timer(10, (_) {
+      new Timer(const Duration(milliseconds: 10), () {
         client.addCredentials(
             url, realm, new HttpClientBasicCredentials(username, password));
         completer.complete(true);