Rework Timer interface.

tests/standalone/io/secure_session_resume_test.dart

Index: tests/standalone/io/secure_session_resume_test.dart
diff --git a/tests/standalone/io/secure_session_resume_test.dart b/tests/standalone/io/secure_session_resume_test.dart
index fa0edd116a0bb3dcdffc08eb8579aae7bcf54e87..1ae1f7353c0182a7c3196d5a9ad4deec7079969a 100644
--- a/tests/standalone/io/secure_session_resume_test.dart
+++ b/tests/standalone/io/secure_session_resume_test.dart
@@ -123,11 +123,11 @@ void main() {
     keepAlive.close();
   };
 
-  int delay = 0;
-  int delay_between_connections = 300;  // Milliseconds.
+  Duration delay = const Duration();

[Lasse Reichstein Nielsen, 2013/02/11 13:01:21]

This should not be allowed. Rally. I assume it's zero, but it's NOT obvious.

[floitsch, 2013/02/11 19:21:32]

We can't really avoid it.
made it clear.

+  Duration delay_between_connections = const Duration(milliseconds: 300);
 
   for (var x in CLIENT_NAMES) {
-    new Timer(delay, (_) {
+    new Timer(delay, () {
       new SecureTestClient(port, x);
     });
     delay += delay_between_connections;