diff -r 000000000000 -r 6474c204b198 hal/fallback/FallbackLights.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal/fallback/FallbackLights.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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 "Hal.h"
+
+namespace mozilla {
+namespace hal_impl {
+
+bool
+SetLight(hal::LightType light, const hal::LightConfiguration& aConfig)
+{
+  return true;
+}
+
+bool
+GetLight(hal::LightType light, hal::LightConfiguration* aConfig)
+{
+  aConfig->light() = light;
+  // The rest of the fields are 0 by default, which is fine.
+  return true;
+}
+
+} // namespace hal_impl
+} // namespace mozilla