Roll Observatory packages and add a roll script

packages/charted/test.disabled/test_in_browser.dart

Index: packages/charted/test.disabled/test_in_browser.dart
diff --git a/packages/charted/test.disabled/test_in_browser.dart b/packages/charted/test.disabled/test_in_browser.dart
new file mode 100644
index 0000000000000000000000000000000000000000..699c6c23ef726624143a4f4439ea6a4324e77e1d
--- /dev/null
+++ b/packages/charted/test.disabled/test_in_browser.dart
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+import 'package:unittest/html_config.dart';
+import 'charted_tests.dart' as tests;
+
+main() {
+  useHtmlConfiguration();
+  tests.allChartedTests();
+}