diff -r 000000000000 -r 6474c204b198 layout/generic/nsDirection.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/generic/nsDirection.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et tw=78: */
+/* 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 nsDirection_h___
+#define nsDirection_h___
+
+// This file makes the nsDirection enum present both in nsIFrame.h and
+// nsISelectionPrivate.h.
+
+enum nsDirection {
+  eDirNext    = 0,
+  eDirPrevious= 1
+};
+
+#endif
+