Initial commit for Chrome.* APIs in Dart

tools/dom/src/chrome/sample.dart

-// 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.
-
-part of chrome;
-
-// This is an example of exposing chrome APIs in Dart and will be replaced with
-// the proper implementation in the future.
-
-class AppModule {
-  AppModule._();
-
-  WindowModule get window => new WindowModule._();
-}
-
-class WindowModule {
-  WindowModule._();
-
-  void create(String url) {
-    var chrome = JS('', 'chrome');
-
-    if (chrome == null) {
-      throw new UnsupportedError('Not supported by current browser');
-    }
-    var app = JS('', '#.app', chrome);
-    if (app == null) {
-      throw new UnsupportedError('Not supported by current browser');
-    }
-    var window = JS('', '#.window', app);
-    if (app == null) {
-      throw new UnsupportedError('Not supported by current browser');
-    }
-    JS('void', '#.create(#)', window, url);
-  }
-}
-
-final app = new AppModule._();