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

ppapi/thunk/ppb_image_data_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_errors.h"
 #include "ppapi/c/trusted/ppb_image_data_trusted.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 #include "ppapi/thunk/thunk.h"
 
@@ skipping 10 matching lines @@
     return PP_ERROR_BADRESOURCE;
   return enter.object()->GetSharedMemory(handle, byte_count);
 }
 
 const PPB_ImageDataTrusted g_ppb_image_data_trusted_thunk = {
   &GetSharedMemory
 };
 
 }  // namespace
 
-const PPB_ImageDataTrusted* GetPPB_ImageDataTrusted_Thunk() {
+const PPB_ImageDataTrusted_0_4* GetPPB_ImageDataTrusted_0_4_Thunk() {
   return &g_ppb_image_data_trusted_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi