Add NaCl proxy for pepper gamepad

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_gamepad.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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_PPB_GAMEPAD_H_
+#define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_PPB_GAMEPAD_H_
+
+#include "native_client/src/include/nacl_macros.h"
+#include "ppapi/c/dev/ppb_gamepad_dev.h"
+
+namespace ppapi_proxy {
+
+// Implements the untrusted side of the PPB_Gamepad interface.
+class PluginGamepad {
+ public:
+  static const PPB_Gamepad_Dev* GetInterface();
+
+ private:
+  NACL_DISALLOW_COPY_AND_ASSIGN(PluginGamepad);
+};
+
+}  // namespace ppapi_proxy
+
+#endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_PPB_GAMEPAD_H_