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

tests/html/js_interop_4_test.dart

Index: tests/html/js_interop_4_test.dart
diff --git a/tests/html/js_interop_4_test.dart b/tests/html/js_interop_4_test.dart
index 935c790a166860a8ad0172b355959888350b192a..944506b73c0bcfe48dce612a9b99d53b55dcc47e 100644
--- a/tests/html/js_interop_4_test.dart
+++ b/tests/html/js_interop_4_test.dart
@@ -5,6 +5,7 @@
 library JsInterop4Test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
+import 'dart:async';
 import 'dart:html';
 import 'dart:isolate';
 
@@ -52,7 +53,7 @@ main() {
     var done = expectAsync0(() {});
     var fun2 = (message) {
       expect(message, 3);
-      window.setTimeout(done, 0);
+      Timer.run(done);
     };
 
     var port2 = new ReceivePortSync();