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

ppapi/thunk/ppb_file_io_trusted_thunk.cc

 // Copyright (c) 2011 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.
 
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_file_io_trusted.h"
 #include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
@@ skipping 34 matching lines @@
 }
 
 const PPB_FileIOTrusted g_ppb_file_io_trusted_thunk = {
   &GetOSFileDescriptor,
   &WillWrite,
   &WillSetLength
 };
 
 }  // namespace
 
-const PPB_FileIOTrusted* GetPPB_FileIOTrusted_Thunk() {
+const PPB_FileIOTrusted_0_4* GetPPB_FileIOTrusted_0_4_Thunk() {
   return &g_ppb_file_io_trusted_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi