Incorporate Pete's comments on KeyboardEventStream.

tests/html/interactive_test.dart

Index: tests/html/interactive_test.dart
diff --git a/tests/html/interactive_test.dart b/tests/html/interactive_test.dart
index ebc0ff238c61dd8ee68e27dc612bf41ef299eb1a..02d1dda9ab56f0dbd3b8895ff6889f8167f67ea5 100644
--- a/tests/html/interactive_test.dart
+++ b/tests/html/interactive_test.dart
@@ -125,13 +125,13 @@ main() {
           ' 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);
     });
   });