Incorporate Pete's comments on KeyboardEventStream.

tests/html/interactive_test.dart

  // Copyright (c) 2013, 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.
 
 library interactive_test;
 
 import 'dart:async';
 import 'dart:html';
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
@@ skipping 107 matching lines @@
           '${e.charCode}, KeyCode: ${e.keyCode}<br />';
       expect(e.charCode, 0);
     }
     test('keys', () {
       document.body.innerHtml =
           '${document.body.innerHtml}To test keyboard event values, press some '
           'keys on your keyboard.<br /><br />The charcode for keydown and keyup'
           ' should be 0, and the keycode should (generally) be populated with a'
           ' value. Keycode and charcode should both have values for the '
           'keypress event.';
-      new KeyboardEventStream.onKeyDown(document.body).listen(
+      KeyboardEventStream.onKeyDown(document.body).listen(
           keydownHandlerTest);
-      new KeyboardEventStream.onKeyPress(document.body).listen(
+      KeyboardEventStream.onKeyPress(document.body).listen(
           keypressHandlerTest);
-      new KeyboardEventStream.onKeyUp(document.body).listen(
+      KeyboardEventStream.onKeyUp(document.body).listen(
           keyupHandlerTest);
-      new KeyboardEventStream.onKeyUp(document.body).listen(
+      KeyboardEventStream.onKeyUp(document.body).listen(
           keyupHandlerTest2);
     });
   });
 }