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

ppapi/c/ppp_messaging.h

 /* 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.
  */
 
-/* From ppp_messaging.idl modified Mon Aug 29 10:11:34 2011. */
+/* From ppp_messaging.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_PPP_MESSAGING_H_
 #define PPAPI_C_PPP_MESSAGING_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/pp_var.h"
 
@@ skipping 11 matching lines @@
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The <code>PPP_Messaging</code> interface contains pointers to functions
  * that you must implement to handle postMessage events on the associated
  * DOM element.
  */
-struct PPP_Messaging {
+struct PPP_Messaging_1_0 {
   /**
    * HandleMessage() is a function that the browser calls when PostMessage()
    * is invoked on the DOM element for the module instance in JavaScript. Note
    * that PostMessage() in the JavaScript interface is asynchronous, meaning
    * JavaScript execution will not be blocked while HandleMessage() is
    * processing the message.
    *
    * @param[in] instance A <code>PP_Instance</code> identifying one instance
    * of a module.
    * @param[in] message A <code>PP_Var</code> containing the data to be sent
@@ skipping 14 matching lines @@
    *   <script type="text/javascript">
    *     document.getElementById('plugin').postMessage("Hello world!");
    *   </script>
    * </body>
    *
    * </code>
    *
    */
   void (*HandleMessage)(PP_Instance instance, struct PP_Var message);
 };
+
+typedef struct PPP_Messaging_1_0 PPP_Messaging;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPP_MESSAGING_H_ */