pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/tests/browser/robocop/testSnackbarAPI.js

@@ -0,0 +1,21 @@
+// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Snackbars", "resource://gre/modules/Snackbars.jsm");
+
+add_task(function* test_snackbar_api() {
+  Snackbars.show("This is a Snackbar", Snackbars.LENGTH_INDEFINITE, {
+    action: {
+      label: "Click me",
+      callback: function () {}
+    }
+  });
+});
+
+run_next_test();