Support for observable models, fixes #259

test/perf/input/observe_model.dart

Index: test/perf/input/observe_model.dart
diff --git a/test/perf/input/observe_model.dart b/test/perf/input/observe_model.dart
new file mode 100644
index 0000000000000000000000000000000000000000..fc899ed0f36e5154e0c76f4427aa9ce305aad200
--- /dev/null
+++ b/test/perf/input/observe_model.dart
@@ -0,0 +1,13 @@
+// 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.
+
+library observe_model;
+
+import 'package:web_ui/observe.dart';
+
+@observable
+class Model {
+  int x = 0;
+  int y = 0;
+}