Roll Observatory packages and add a roll script

packages/polymer/test/template_attr_template_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';
+
+int testsRun = 0;
+
+@CustomTag('decoration-test')
+class DecorationTest extends PolymerElement {
+  List<int> options = [1, 2, 3, 4];
+
+  DecorationTest.created() : super.created();
+
+  ready() {
+    this.test();
+    testsRun++;
+  }
+
+  test() {
+    expect($['select'].children.length, 5,
+        reason: 'attribute template stamped');
+  }
+}
+
+@CustomTag('decoration-test2')
+class DecorationTest2 extends DecorationTest {
+  List<List<int>> arrs = [[1, 2, 3], [4, 5, 6]];
+
+  DecorationTest2.created() : super.created();
+
+  test() {
+    expect($['tbody'].children.length, 3, reason: 'attribute template stamped');
+    expect($['tbody'].children[1].children.length, 4,
+        reason: 'attribute sub-template stamped');
+  }
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('declaration-tests-ran', () {
+    expect(testsRun, 2, reason: 'decoration-tests-ran');
+  });
+}));