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

ppapi/thunk/ppb_zoom_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_zoom_dev.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_instance_api.h"
 
 namespace ppapi {
@@ skipping 17 matching lines @@
   }
 }
 
 const PPB_Zoom_Dev g_ppb_zoom_thunk = {
   &ZoomChanged,
   &ZoomLimitsChanged
 };
 
 }  // namespace
 
-const PPB_Zoom_Dev* GetPPB_Zoom_Dev_Thunk() {
+const PPB_Zoom_Dev_0_2* GetPPB_Zoom_Dev_0_2_Thunk() {
   return &g_ppb_zoom_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi