diff -r 000000000000 -r 6474c204b198 toolkit/xre/nsNativeAppSupportDefault.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/xre/nsNativeAppSupportDefault.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/* 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/. */
+
+#include "nsNativeAppSupportBase.h"
+
+nsresult
+NS_CreateNativeAppSupport( nsINativeAppSupport **aResult )
+{
+  nsNativeAppSupportBase* native = new nsNativeAppSupportBase();
+  if (!native) return NS_ERROR_OUT_OF_MEMORY;
+
+  *aResult = native;
+  NS_ADDREF( *aResult );
+
+  return NS_OK;
+}