Add a skeleton gamepad resource.

ppapi/thunk/ppb_gamepad_api.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_THUNK_PPB_GAMEPAD_API_H_
+#define PPAPI_THUNK_PPB_GAMEPAD_API_H_
+
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+struct PP_GamepadsSampleData;
+
+namespace ppapi {
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT PPB_Gamepad_API {
+ public:
+  virtual ~PPB_Gamepad_API() {}
+
+  virtual void Sample(PP_GamepadsSampleData* data) = 0;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif  // PPAPI_THUNK_PPB_GAMEPAD_API_H_