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

ppapi/c/private/ppb_instance_private.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.
  */
 #ifndef PPAPI_C_PRIVATE_PPB_INSTANCE_PRIVATE_H_
 #define PPAPI_C_PRIVATE_PPB_INSTANCE_PRIVATE_H_
 
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_var.h"
 
-#define PPB_INSTANCE_PRIVATE_INTERFACE "PPB_Instance_Private;0.1"
+#define PPB_INSTANCE_PRIVATE_INTERFACE_0_1 "PPB_Instance_Private;0.1"
+#define PPB_INSTANCE_PRIVATE_INTERFACE PPB_INSTANCE_PRIVATE_INTERFACE_0_1
 
 /**
  * @file
  * This file defines the PPB_Instance_Private interface implemented by the
  * browser and containing pointers to functions available only to trusted plugin
  * instances.
  *
  * @addtogroup Interfaces
  * @{
  */
 
 /**
  * The PPB_Instance_Private interface contains functions available only to
  * trusted plugin instances.
  *
  */
-struct PPB_Instance_Private {
+struct PPB_Instance_Private_0_1 {
   /**
    * GetWindowObject is a pointer to a function that determines
    * the DOM window containing this module instance.
    *
    * @param[in] instance A PP_Instance whose WindowObject should be retrieved.
    * @return A PP_Var containing window object on success.
    */
   struct PP_Var (*GetWindowObject)(PP_Instance instance);
 
   /**
@@ skipping 20 matching lines @@
    * this to NULL if you don't want exception info; initialize this to a void
    * exception if want exception info.
    *
    * @return The result of the script execution, or a "void" var
    * if execution failed.
    */
   struct PP_Var (*ExecuteScript)(PP_Instance instance,
                                  struct PP_Var script,
                                  struct PP_Var* exception);
 };
+
+typedef struct PPB_Instance_Private_0_1 PPB_Instance_Private;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PRIVATE_PPB_INSTANCE_PRIVATE_H_ */
-