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

ppapi/shared_impl/private/net_address_private_impl.cc

Index: ppapi/shared_impl/private/net_address_private_impl.cc
diff --git a/ppapi/shared_impl/private/net_address_private_impl.cc b/ppapi/shared_impl/private/net_address_private_impl.cc
index 3b9a4ae5626fa10f326fe9262171e3076dcd2b25..7185eaa087bb9e9e7514306726bbdf562618ded3 100644
--- a/ppapi/shared_impl/private/net_address_private_impl.cc
+++ b/ppapi/shared_impl/private/net_address_private_impl.cc
@@ -281,8 +281,8 @@ const PPB_NetAddress_Private net_address_private_interface = {
 
 namespace thunk {
 
-PPAPI_THUNK_EXPORT const PPB_NetAddress_Private*
-GetPPB_NetAddress_Private_Thunk() {
+PPAPI_THUNK_EXPORT const PPB_NetAddress_Private_0_1*
+GetPPB_NetAddress_Private_0_1_Thunk() {
   return &net_address_private_interface;
 }