Kill a #if 0 section as discussed in the meeting.

ppapi/c/dev/ppb_file_ref_dev.h

Index: ppapi/c/dev/ppb_file_ref_dev.h
===================================================================
--- ppapi/c/dev/ppb_file_ref_dev.h	(revision 66341)
+++ ppapi/c/dev/ppb_file_ref_dev.h	(working copy)
@@ -75,15 +75,6 @@
   int32_t (*Rename)(PP_Resource file_ref,
                     PP_Resource new_file_ref,
                     struct PP_CompletionCallback callback);
-
-  // TODO(darin): Add these conversion routines.
-#if 0
-  // Convert a DOM File object to a FileRef object.
-  PP_Resource (*FromFileObject)(PP_Var file_object);
-
-  // Convert a FileRef object to a DOM File object.
-  PP_Var (*ToFileObject)(PP_Resource file_ref);
-#endif
 };
 
 #endif  // PPAPI_C_DEV_PPB_FILE_REF_DEV_H_