Add Pepper API to use UDP

ppapi/thunk/thunk.h

Index: ppapi/thunk/thunk.h
diff --git a/ppapi/thunk/thunk.h b/ppapi/thunk/thunk.h
index e33a5eeeda53a1fc1c87cca9eb55e23a4f6fd880..fe90eff61bc1f942677a87f37767c1c8112720c0 100644
--- a/ppapi/thunk/thunk.h
+++ b/ppapi/thunk/thunk.h
@@ -35,6 +35,7 @@ struct PPB_FileIOTrusted;
 struct PPB_Flash_Menu;
 struct PPB_Flash_NetConnector;
 struct PPB_Flash_TCPSocket;
+struct PPB_Flash_UDPSocket;
 struct PPB_Graphics3D;
 struct PPB_Graphics3DTrusted;
 struct PPB_ImageDataTrusted;
@@ -60,6 +61,7 @@ PPAPI_THUNK_EXPORT const PPB_Flash_Menu* GetPPB_Flash_Menu_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_NetConnector*
     GetPPB_Flash_NetConnector_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Flash_TCPSocket* GetPPB_Flash_TCPSocket_Thunk();
+PPAPI_THUNK_EXPORT const PPB_Flash_UDPSocket* GetPPB_Flash_UDPSocket_Thunk();
 PPAPI_THUNK_EXPORT const PPB_Graphics3DTrusted*
     GetPPB_Graphics3DTrusted_Thunk();
 PPAPI_THUNK_EXPORT const PPB_ImageDataTrusted* GetPPB_ImageDataTrusted_Thunk();