diff -r 000000000000 -r 6474c204b198 toolkit/xre/MacLaunchHelper.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/xre/MacLaunchHelper.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
+
+#ifndef MacLaunchHelper_h_
+#define MacLaunchHelper_h_
+
+#include <stdint.h>
+
+#include <unistd.h>
+
+extern "C" {
+  void LaunchChildMac(int aArgc, char** aArgv, uint32_t aRestartType = 0,
+                      pid_t *pid = 0);
+}
+
+#endif