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

ppapi/c/dev/ppb_buffer_dev.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 dev/ppb_buffer_dev.idl modified Fri Aug 26 13:58:06 2011. */
+/* From dev/ppb_buffer_dev.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_DEV_PPB_BUFFER_DEV_H_
 #define PPAPI_C_DEV_PPB_BUFFER_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_BUFFER_DEV_INTERFACE_0_4 "PPB_Buffer(Dev);0.4"
 #define PPB_BUFFER_DEV_INTERFACE PPB_BUFFER_DEV_INTERFACE_0_4
 
 /**
  * @file
  * This file defines the <code>PPB_Buffer_Dev</code> interface.
  */
 
 
 /**
  * @addtogroup Interfaces
  * @{
  */
-struct PPB_Buffer_Dev {
+struct PPB_Buffer_Dev_0_4 {
   /**
    * Allocates a buffer of the given size in bytes. The return value will have
    * a non-zero ID on success, or zero on failure. Failure means the module
    * handle was invalid. The buffer will be initialized to contain zeroes.
    */
   PP_Resource (*Create)(PP_Instance instance, uint32_t size_in_bytes);
   /**
    * Returns PP_TRUE if the given resource is a Buffer. Returns PP_FALSE if the
    * resource is invalid or some type other than a Buffer.
    */
   PP_Bool (*IsBuffer)(PP_Resource resource);
   /**
    * Gets the size of the buffer. Returns PP_TRUE on success, PP_FALSE
    * if the resource is not a buffer. On failure, |*size_in_bytes| is not set.
    */
   PP_Bool (*Describe)(PP_Resource resource, uint32_t* size_in_bytes);
   /**
    * Maps this buffer into the plugin address space and returns a pointer to
    * the beginning of the data.
    */
   void* (*Map)(PP_Resource resource);
   /**
    * Unmaps this buffer.
    */
   void (*Unmap)(PP_Resource resource);
 };
+
+typedef struct PPB_Buffer_Dev_0_4 PPB_Buffer_Dev;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_DEV_PPB_BUFFER_DEV_H_ */