Combine window.setTimeout/setInterval with Timer and Timer.repeating. Also

samples/tests/samples/swarm/swarm_test.dart

Index: samples/tests/samples/swarm/swarm_test.dart
diff --git a/samples/tests/samples/swarm/swarm_test.dart b/samples/tests/samples/swarm/swarm_test.dart
index 59edc3adff74794bc2442efb378c6fb91b51b59e..915e5b96e8dbef29276bd1ff07481053c915810c 100644
--- a/samples/tests/samples/swarm/swarm_test.dart
+++ b/samples/tests/samples/swarm/swarm_test.dart
@@ -5,6 +5,7 @@
 library swarm_tests;
 
 import 'dart:html';
+import 'dart:async';
 import '../../../swarm/swarmlib.dart';
 import '../../../swarm/swarm_ui_lib/base/base.dart';
 import '../../../swarm/swarm_ui_lib/view/view.dart';
@@ -149,9 +150,9 @@ void _serialInvokeAsync(List closures) {
       closures[i]();
       i++;
       if (i < length) {
-        window.setTimeout(expectAsync0(invokeNext), 0);
+        Timer.run(expectAsync0(invokeNext));
       }
     }
-    window.setTimeout(expectAsync0(invokeNext), 0);
+    Timer.run(expectAsync0(invokeNext));
   }
 }