aChange all asyncTest/callbackDone style tests to use the new expectAsync/

tests/html/window_open_test.dart

 #library('WindowOpenTest');
 #import('../../lib/unittest/unittest.dart');
 #import('../../lib/unittest/html_config.dart');
 #import('dart:html');
 
 main() {
   evaluateJavaScript(code) {
     final scriptTag = new Element.tag('script');
     scriptTag.innerHTML = code;
     document.body.nodes.add(scriptTag);
   }
   evaluateJavaScript('layoutTestController.setCanOpenWindows()');
 
   useHtmlConfiguration();
-  asyncTest('TwoArgumentVersion', 1, () {
+  test('TwoArgumentVersion', () {
     Window win = window.open('../resources/pong.html', 'testWindow');
     closeWindow(win);
   });
-  asyncTest('ThreeArgumentVersion', 1, () {
+  test('ThreeArgumentVersion', () {
     Window win = window.open("resources/pong.html", "testWindow", "scrollbars=yes,width=75,height=100");
     closeWindow(win);
   });
 }
 
 closeWindow(win) {
   win.close();
   doneHandler() {
-    window.setTimeout(win.closed ? callbackDone : doneHandler, 1);
+    if (!win.closed) {
+      window.setTimeout(expectAsync0(doneHandler), 1);
+    }
   }
-  window.setTimeout(doneHandler, 1);
+  window.setTimeout(expectAsync0(doneHandler), 1);
 }