Roll Observatory packages and add a roll script

packages/polymer/test/web_components_less_test.dart

+// Copyright (c) 2014, 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.web.web_components_less_test;
+
+import 'dart:html';
+import 'dart:js';
+import 'package:polymer/polymer.dart';
+import 'package:unittest/html_config.dart';
+import 'package:unittest/unittest.dart';
+
+int elementsReadied = 0;
+
+@CustomTag('x-import')
+class XImport extends PolymerElement {
+  XImport.created() : super.created();
+
+  ready() {
+    elementsReadied++;
+  }
+}
+
+@CustomTag('x-main')
+class XMain extends PolymerElement {
+  XMain.created() : super.created();
+
+  ready() {
+    elementsReadied++;
+  }
+}
+
+main() => initPolymer().then((zone) => zone.run(() {
+  useHtmlConfiguration();
+
+  setUp(() => Polymer.onReady);
+
+  test('web-components-less configuration', () {
+    var jsDoc = new JsObject.fromBrowserObject(document);
+    var htmlImports = context['HTMLImports'];
+
+    if (!ShadowRoot.supported || !(new LinkElement()).supportsImport) return;
+
+    expect(elementsReadied, 2, reason: 'imported elements upgraded');
+  });
+}));