Roll Observatory packages and add a roll script

packages/charted/test.disabled/layout/layout_test.dart

Index: packages/charted/test.disabled/layout/layout_test.dart
diff --git a/packages/charted/test.disabled/layout/layout_test.dart b/packages/charted/test.disabled/layout/layout_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..99c7f4002c73467d4d54a20d0abdb2836850da63
--- /dev/null
+++ b/packages/charted/test.disabled/layout/layout_test.dart
@@ -0,0 +1,19 @@
+/*
+ * 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
+ */
+
+library charted.test.layout;
+
+import 'package:charted/core/utils.dart';
+import 'package:charted/layout/layout.dart';
+import 'package:unittest/unittest.dart';
+
+part 'pie_layout_test.dart';
+
+layoutTests() {
+  testPieLayout();
+}