Upgrading tests with unittest deprecations

tests/html/keyboard_event_test.dart

 library KeyboardEventTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:html';
 
 // Test that we are correctly determining keyCode and charCode uniformly across
 // browsers.
 
 main() {
 
@@ skipping 13 matching lines @@
         keydownHandlerTest);
     var subscription3 = document.body.onKeyDown.listen(
         (e) => print('regular listener'));
     subscription.cancel();
     subscription2.cancel();
     subscription3.cancel();
   });
 
   test('constructKeyEvent', () {
     var stream = KeyEvent.keyPressEvent.forTarget(document.body);
-    var subscription = stream.listen(expectAsync1((keyEvent) {
+    var subscription = stream.listen(expectAsync((keyEvent) {
       expect(keyEvent.charCode, 97);
       expect(keyEvent.keyCode, 65);
     }));
     var k = new KeyEvent('keypress', keyCode: 65, charCode: 97);
     stream.add(k);
     subscription.cancel();
     // Capital "A":
     stream.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
 
-    subscription = stream.listen(expectAsync1((keyEvent) {
+    subscription = stream.listen(expectAsync((keyEvent) {
       expect(keyEvent.charCode, 65);
       expect(keyEvent.keyCode, 65);
     }));
     stream.add(new KeyEvent('keypress', keyCode: 65, charCode: 65));
     subscription.cancel();
   });
 
   test('KeyEventSequence', () {
     // Press "?" by simulating "shift" and then the key that has "/" and "?" on
     // it.
     var streamDown = KeyEvent.keyDownEvent.forTarget(document.body);
     var streamPress = KeyEvent.keyPressEvent.forTarget(document.body);
     var streamUp = KeyEvent.keyUpEvent.forTarget(document.body);
 
-    var subscription = streamDown.listen(expectAsync1((keyEvent) {
+    var subscription = streamDown.listen(expectAsync((keyEvent) {
       expect(keyEvent.keyCode, isIn([16, 191]));
       expect(keyEvent.charCode, 0);
     }, count: 2));
 
-    var subscription2 = streamPress.listen(expectAsync1((keyEvent) {
+    var subscription2 = streamPress.listen(expectAsync((keyEvent) {
       expect(keyEvent.keyCode, 23);
       expect(keyEvent.charCode, 63);
     }));
 
-    var subscription3 = streamUp.listen(expectAsync1((keyEvent) {
+    var subscription3 = streamUp.listen(expectAsync((keyEvent) {
       expect(keyEvent.keyCode, isIn([16, 191]));
       expect(keyEvent.charCode, 0);
     }, count: 2));
 
     streamDown.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
     streamDown.add(new KeyEvent('keydown', keyCode: 191, charCode: 0));
 
     streamPress.add(new KeyEvent('keypress', keyCode: 23, charCode: 63));
 
     streamUp.add(new KeyEvent('keyup', keyCode: 191, charCode: 0));
     streamUp.add(new KeyEvent('keyup', keyCode: 16, charCode: 0));
     subscription.cancel();
     subscription2.cancel();
     subscription3.cancel();
   });
 
   test('KeyEventKeyboardEvent', () {
-    window.onKeyDown.listen(expectAsync1((KeyboardEvent event) {
+    window.onKeyDown.listen(expectAsync((KeyboardEvent event) {
       expect(event.keyCode, 16);
     }));
     var streamDown = KeyEvent.keyDownEvent.forTarget(document.body);
     streamDown.add(new KeyEvent('keydown', keyCode: 16, charCode: 0));
   });
 }