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

ppapi/c/ppb_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 ppb_messaging.idl modified Mon Aug 29 10:11:34 2011. */
+/* From ppb_messaging.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_PPB_MESSAGING_H_
 #define PPAPI_C_PPB_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 10 matching lines @@
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The <code>PPB_Messaging</code> interface is implemented by the browser
  * and is related to sending messages to JavaScript message event listeners on
  * the DOM element associated with specific module instance.
  */
-struct PPB_Messaging {
+struct PPB_Messaging_1_0 {
   /**
    * PostMessage() asynchronously invokes any listeners for message events on
    * the DOM element for the given module instance. A call to PostMessage()
    * will not block while the message is processed.
    *
    * @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 to
    * JavaScript.
    * Message can have a numeric, boolean, or string value; arrays and
@@ skipping 38 matching lines @@
    *                                                    sizeof(hello_world));
    *  ppb_messaging_interface->PostMessage(instance, hello_var); // Copies var.
    *  ppb_var_interface->Release(hello_var);
    *
    * </code>
    *
    * The browser will pop-up an alert saying "Hello world!"
    */
   void (*PostMessage)(PP_Instance instance, struct PP_Var message);
 };
+
+typedef struct PPB_Messaging_1_0 PPB_Messaging;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_MESSAGING_H_ */