Roll Observatory packages and add a roll script

packages/polymer/test/entered_view_test.dart

Index: packages/polymer/test/entered_view_test.dart
diff --git a/packages/polymer/test/entered_view_test.dart b/packages/polymer/test/entered_view_test.dart
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index 0000000000000000000000000000000000000000..ddbda4472c786d243056913fd712ff38418e5cf9
--- /dev/null
+++ b/packages/polymer/test/entered_view_test.dart
@@ -0,0 +1,51 @@
+// 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.
+
+library polymer.test.entered_view_test;
+
+import 'dart:async';
+import 'dart:html';
+import 'package:polymer/polymer.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+@reflectable
+class XOuter extends PolymerElement {
+  @observable bool expand = false;
+
+  XOuter.created() : super.created();
+}
+
+@reflectable
+class XInner extends PolymerElement {
+  int enteredCount = 0;
+
+  XInner.created() : super.created();
+
+  attached() {
+    enteredCount++;
+    super.attached();
+  }
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+  Polymer.register('x-inner', XInner);
+  Polymer.register('x-outer', XOuter);
+
+  setUp(() => Polymer.onReady);
+
+  test('element created properly', () {
+    XOuter outer = querySelector('x-outer');
+    outer.expand = true;
+    return outer.onMutation(outer.shadowRoot).then((_) {
+      // Element upgrade is also using mutation observers. Wait another tick so
+      // it goes before we do.
+      return new Future(() {
+        XInner inner = outer.shadowRoot.querySelector('x-inner');
+        expect(inner.enteredCount, 1, reason: 'attached should be called');
+      });
+    });
+  });
+}));