Add property base to the Uri class

tests/html/window_test.dart

Index: tests/html/window_test.dart
diff --git a/tests/html/window_test.dart b/tests/html/window_test.dart
index a663d1be16df9e1c8aa5d41fa1222ecdebb2794b..edf822d18756aeae8f9a2fffb9fed334940db921 100644
--- a/tests/html/window_test.dart
+++ b/tests/html/window_test.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2012, 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 WindowTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';