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

ppapi/c/private/ppb_file_ref_private.h

Index: ppapi/c/private/ppb_file_ref_private.h
diff --git a/ppapi/c/private/ppb_file_ref_private.h b/ppapi/c/private/ppb_file_ref_private.h
index 43c1cfe1f7d6f858ee264ad2a2883ee306283a23..883010d5b42409ad7ac202749041ac3dce05f21f 100644
--- a/ppapi/c/private/ppb_file_ref_private.h
+++ b/ppapi/c/private/ppb_file_ref_private.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From private/ppb_file_ref_private.idl modified Mon Dec 12 14:04:17 2011. */
+/* From private/ppb_file_ref_private.idl modified Fri Dec 16 17:34:59 2011. */
 
 #ifndef PPAPI_C_PRIVATE_PPB_FILE_REF_PRIVATE_H_
 #define PPAPI_C_PRIVATE_PPB_FILE_REF_PRIVATE_H_
@@ -27,7 +27,7 @@
  * @{
  */
 /* PPB_FileRefPrivate interface */
-struct PPB_FileRefPrivate {
+struct PPB_FileRefPrivate_0_1 {
   /**
    * GetAbsolutePath() returns the absolute path of the file.
    *
@@ -38,6 +38,8 @@ struct PPB_FileRefPrivate {
    */
   struct PP_Var (*GetAbsolutePath)(PP_Resource file_ref);
 };
+
+typedef struct PPB_FileRefPrivate_0_1 PPB_FileRefPrivate;
 /**
  * @}
  */