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

ppapi/thunk/ppb_file_chooser_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/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_file_chooser_trusted.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/common.h"
@@ skipping 60 matching lines @@
   &Show,
   &GetNextChosenFile
 };
 
 const PPB_FileChooserTrusted g_ppb_file_chooser_trusted_thunk = {
   &ShowWithoutUserGesture
 };
 
 }  // namespace
 
-const PPB_FileChooser_Dev* GetPPB_FileChooser_Dev_Thunk() {
+const PPB_FileChooser_Dev_0_5* GetPPB_FileChooser_Dev_0_5_Thunk() {
   return &g_ppb_file_chooser_thunk;
 }
 
-const PPB_FileChooserTrusted* GetPPB_FileChooser_Trusted_Thunk() {
+const PPB_FileChooserTrusted_0_5* GetPPB_FileChooser_Trusted_0_5_Thunk() {
   return &g_ppb_file_chooser_trusted_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi