Clean up WheelEvent

tests/html/text_event_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Regression test for dart2js, that used to emit wrong code on is
-// checks of native classes that are not instantiated.
-
-import 'dart:html';
+library text_event_test;
+import "package:expect/expect.dart";
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
+import 'dart:html';
 
-var a = [new Object()];
+import 'event_test.dart';
 
 main() {
   useHtmlConfiguration();
 
-  test('is', () {
-    expect(a[0] is Node, isFalse);
-  });
+  eventTest('TextEvent', () => new TextEvent('foo', view: window, data: 'data'),
+      (ev) { expect(ev.data, 'data'); });
 }