new file mode 100644
--- /dev/null
+++ b/media/webrtc/trunk/gtest/OSXRunLoopSingleton.cpp
@@ -0,0 +1,11 @@
+/* -*- 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/. */
+
+// stub implementation so we don't need to rely upon xpcom
+extern "C" {
+void mozilla_set_coreaudio_notification_runloop_if_needed()
+{
+}
+}