Support for observable models, fixes #259

test/data/input/escape_test.html

Index: test/data/input/escape_test.html
diff --git a/test/data/input/escape_test.html b/test/data/input/escape_test.html
index c76209dfac9c1d19a035897666a46f39db79290a..622dddf75ec9d5ccfe8f94e0abbdcbd82f6885c8 100644
--- a/test/data/input/escape_test.html
+++ b/test/data/input/escape_test.html
@@ -17,13 +17,13 @@ BSD-style license that can be found in the LICENSE file.
   <script type="application/dart">
   import 'dart:html';
   import 'package:unittest/unittest.dart';
-  import 'package:web_ui/watcher.dart';
+  import 'package:web_ui/observe.dart';
   import 'package:web_ui/safe_html.dart';
 
-  var text = '<span>hello</span>';
-  var html = new SafeHtml.unsafe('<span>hello</span>');
+  @observable var text = '<span>hello</span>';
+  @observable var html = new SafeHtml.unsafe('<span>hello</span>');
   main() {
-    window.setTimeout(() => window.postMessage('done', '*'), 0);
+    window.setImmediate(() => window.postMessage('done', '*'));
   }
   </script>
 </body>