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

ppapi/c/ppb_file_io.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_file_io.idl modified Thu Dec  1 10:47:02 2011. */
+/* From ppb_file_io.idl modified Wed Dec 14 18:08:00 2011. */
 
 #ifndef PPAPI_C_PPB_FILE_IO_H_
 #define PPAPI_C_PPB_FILE_IO_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_file_info.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
@@ skipping 49 matching lines @@
  */
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The <code>PPB_FileIO</code> struct is used to operate on a regular file
  * (PP_FileType_Regular).
  */
-struct PPB_FileIO {
+struct PPB_FileIO_1_0 {
   /**
    * Create() creates a new FileIO object.
    *
    * @param[in] instance A <code>PP_Instance</code> identifying the instance
    * with the file.
    *
    * @return A <code>PP_Resource</code> corresponding to a FileIO if
    * successful or 0 if the module is invalid.
    */
   PP_Resource (*Create)(PP_Instance instance);
@@ skipping 159 matching lines @@
    * valid to call Open() again after a call to this method.
    * <strong>Note:</strong> If the FileIO object is destroyed, and it is still
    * open, then it will be implicitly closed, so you are not required to call
    * Close().
    *
    * @param[in] file_io A <code>PP_Resource</code> corresponding to a file
    * FileIO.
    */
   void (*Close)(PP_Resource file_io);
 };
+
+typedef struct PPB_FileIO_1_0 PPB_FileIO;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_FILE_IO_H_ */