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

ppapi/c/ppb_file_ref.h

Index: ppapi/c/ppb_file_ref.h
diff --git a/ppapi/c/ppb_file_ref.h b/ppapi/c/ppb_file_ref.h
index da07f32d7f5db9f3b96e8660ba56f66652538ad9..a314991f571c5fca58b8a46e73ede6ade36b2762 100644
--- a/ppapi/c/ppb_file_ref.h
+++ b/ppapi/c/ppb_file_ref.h
@@ -3,7 +3,7 @@
  * 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_
@@ -36,7 +36,7 @@
  * 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.
@@ -178,6 +178,8 @@ struct PPB_FileRef {
                     PP_Resource new_file_ref,
                     struct PP_CompletionCallback callback);
 };
+
+typedef struct PPB_FileRef_1_0 PPB_FileRef;
 /**
  * @}
  */