Stubbing out the initial library for Chrome application support.

tools/dom/src/chrome/sample.dart

Index: tools/dom/src/chrome/sample.dart
diff --git a/tools/dom/src/chrome/sample.dart b/tools/dom/src/chrome/sample.dart
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+++ b/tools/dom/src/chrome/sample.dart
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+// 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._();