Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/thunk/ppb_udp_socket_private_thunk.cc

Index: ppapi/thunk/ppb_udp_socket_private_thunk.cc
diff --git a/ppapi/thunk/ppb_udp_socket_private_thunk.cc b/ppapi/thunk/ppb_udp_socket_private_thunk.cc
index c2c4b5f7202c623a63d96b71a6235dc916ca05df..97c3a844b9c117d091fb7c17b6023bd4a9b8db43 100644
--- a/ppapi/thunk/ppb_udp_socket_private_thunk.cc
+++ b/ppapi/thunk/ppb_udp_socket_private_thunk.cc
@@ -89,10 +89,9 @@ const PPB_UDPSocket_Private g_ppb_udp_socket_thunk = {
 
 }  // namespace
 
-const PPB_UDPSocket_Private* GetPPB_UDPSocket_Private_Thunk() {
+const PPB_UDPSocket_Private_0_2* GetPPB_UDPSocket_Private_0_2_Thunk() {
   return &g_ppb_udp_socket_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi
-