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

ppapi/c/ppb_file_ref.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_ref.idl modified Wed Aug 24 20:52:42 2011. */
+/* From ppb_file_ref.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_PPB_FILE_REF_H_
 #define PPAPI_C_PPB_FILE_REF_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_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
@@ skipping 12 matching lines @@
 
 /**
  * @addtogroup Interfaces
  * @{
  */
 /**
  * The <code>PPB_FileRef</code> struct represents a "weak pointer" to a file in
  * a file system.  This struct contains a <code>PP_FileSystemType</code>
  * identifier and a file path string.
  */
-struct PPB_FileRef {
+struct PPB_FileRef_1_0 {
   /**
    * Create() creates a weak pointer to a file in the given file system. File
    * paths are POSIX style.
    *
    * @param[in] resource A <code>PP_Resource</code> corresponding to a file
    * system.
    * @param[in] path A path to the file.
    *
    * @return A <code>PP_Resource</code> corresponding to a file reference if
    * successful or 0 if the path is malformed.
@@ skipping 121 matching lines @@
    * file reference.
    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
    * completion of Rename().
    *
    * @return An int32_t containing an error code from <code>pp_errors.h</code>.
    */
   int32_t (*Rename)(PP_Resource file_ref,
                     PP_Resource new_file_ref,
                     struct PP_CompletionCallback callback);
 };
+
+typedef struct PPB_FileRef_1_0 PPB_FileRef;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_FILE_REF_H_ */