Remove deprecated ms arguments for Timer and Future.

tests/standalone/io/raw_secure_socket_pause_test.dart

Index: tests/standalone/io/raw_secure_socket_pause_test.dart
diff --git a/tests/standalone/io/raw_secure_socket_pause_test.dart b/tests/standalone/io/raw_secure_socket_pause_test.dart
index a223e81d5bb21457b5f3662070fa8b7d3930c34a..2b3f63f9eca0b9391bf92cdd7861501730ba286f 100644
--- a/tests/standalone/io/raw_secure_socket_pause_test.dart
+++ b/tests/standalone/io/raw_secure_socket_pause_test.dart
@@ -31,7 +31,7 @@ void main() {
     void runPauseTest() {
       subscription.pause();
       paused = true;
-      new Timer(500, (_) {
+      new Timer(const Duration(milliseconds: 500), () {
           paused = false;
           subscription.resume();
       });
@@ -42,7 +42,7 @@ void main() {
       readEventsTested = true;
       socket.readEventsEnabled = false;
       readEventsPaused = true;
-      new Timer(500, (_) {
+      new Timer(const Duration(milliseconds: 500), () {
         readEventsPaused = false;
         socket.readEventsEnabled = true;
       });