Roll Observatory packages and add a roll script

packages/polymer/test/bind_test.dart

+// Copyright (c) 2013, 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.
+
+import 'dart:async';
+import 'dart:html';
+import 'package:polymer/polymer.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+@CustomTag('x-bar')
+class XBar extends PolymerElement {
+  XBar.created() : super.created();
+
+  get testValue => true;
+}
+
+@CustomTag('x-foo')
+class XFoo extends PolymerElement {
+  @observable var foo = 'foo!';
+  final _testDone = new Completer();
+  Future get onTestDone => _testDone.future;
+
+  XFoo.created() : super.created();
+
+  _runTest(_) {
+    expect($['bindId'].text.trim(), 'bar!');
+
+    expect(foo, $['foo'].attributes['foo']);
+    expect($['bool'].attributes['foo'], '');
+    expect($['bool'].attributes, isNot(contains('foo?')));
+    expect($['content'].innerHtml, foo);
+
+    expect(foo, $['bar'].attributes['foo']);
+    expect($['barBool'].attributes['foo'], '');
+    expect($['barBool'].attributes, isNot(contains('foo?')));
+    expect($['barContent'].innerHtml, foo);
+    _testDone.complete();
+  }
+
+  ready() {
+    onMutation($['bindId']).then(_runTest);
+  }
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('ready called', () => (querySelector('x-foo') as XFoo).onTestDone);
+}));