diff -r 000000000000 -r 6474c204b198 dom/gamepad/GamepadButton.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/gamepad/GamepadButton.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* 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 "mozilla/dom/GamepadButton.h"
+#include "mozilla/dom/GamepadBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(GamepadButton)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(GamepadButton)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GamepadButton)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(GamepadButton, mParent)
+
+/* virtual */ JSObject*
+GamepadButton::WrapObject(JSContext* aCx)
+{
+  return GamepadButtonBinding::Wrap(aCx, this);
+}
+
+} // namespace dom
+} // namespace mozilla