Add a skeleton gamepad resource.

ppapi/thunk/ppb_gamepad_api.h

Index: ppapi/thunk/ppb_gamepad_api.h
diff --git a/ppapi/thunk/ppb_gamepad_api.h b/ppapi/thunk/ppb_gamepad_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..ee7199a5d801ed82656675babf97cabd933124c4
--- /dev/null
+++ b/ppapi/thunk/ppb_gamepad_api.h
@@ -0,0 +1,25 @@
+// 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_