diff -r 000000000000 -r 6474c204b198 b2g/components/test/mochitest/permission_handler_chrome.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/components/test/mochitest/permission_handler_chrome.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+/* 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/. */
+
+"use strict";
+
+function debug(str) {
+  dump("CHROME PERMISSON HANDLER -- " + str + "\n");
+}
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+const { Services } = Cu.import("resource://gre/modules/Services.jsm");
+const { SystemAppProxy } = Cu.import("resource://gre/modules/SystemAppProxy.jsm");
+
+let eventHandler = function(evt) {
+  if (!evt.detail || evt.detail.type !== "permission-prompt") {
+    return;
+  }
+
+  sendAsyncMessage("permission-request", evt.detail);
+};
+
+SystemAppProxy.addEventListener("mozChromeEvent", eventHandler);
+
+// need to remove ChromeEvent listener after test finished.
+addMessageListener("teardown", function() {
+  SystemAppProxy.removeEventListener("mozChromeEvent", eventHandler);
+});
+
+addMessageListener("permission-response", function(detail) {
+  SystemAppProxy._sendCustomEvent('mozContentEvent', detail);
+});
+