Remove lib/dom directory!

lib/dom/src/GlobalProperties.dart

Index: lib/dom/src/GlobalProperties.dart
===================================================================
--- lib/dom/src/GlobalProperties.dart	(revision 12066)
+++ lib/dom/src/GlobalProperties.dart	(working copy)
@@ -1,21 +0,0 @@
-// 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.
-
-Window get window {
-  return _NativeDomGlobalProperties.getWindow();
-}
-
-// TODO(vsm): Remove when prefixes are supported.
-Window get dom_window {
-  return _NativeDomGlobalProperties.getWindow();
-}
-
-Document get document {
-  return _NativeDomGlobalProperties.getDocument();
-}
-
-class _NativeDomGlobalProperties {
-  static Window getWindow() native;
-  static Document getDocument() native;
-}