Update from https://crrev.com/316786

third_party/harfbuzz-ng/src/hb-unicode.cc

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2011  Codethink Limited
  * Copyright © 2010,2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
@@ skipping 139 matching lines @@
 #pragma message("Could not find any Unicode functions implementation, you have to provide your own")
 #pragma message("To suppress this warnings, define HB_NO_UNICODE_FUNCS")
 #else
 #warning "Could not find any Unicode functions implementation, you have to provide your own"
 #warning "To suppress this warning, define HB_NO_UNICODE_FUNCS"
 #endif
 #endif
 
 /**
  * hb_unicode_funcs_create: (Xconstructor)
- * @parent: (allow-none):
+ * @parent: (nullable):
  *
  * 
  *
  * Return value: (transfer full):
  *
  * Since: 1.0
  **/
 hb_unicode_funcs_t *
 hb_unicode_funcs_create (hb_unicode_funcs_t *parent)
 {
@@ skipping 388 matching lines @@
   230, /* HB_UNICODE_COMBINING_CLASS_ABOVE */
   231,
   232, /* HB_UNICODE_COMBINING_CLASS_ABOVE_RIGHT */
   233, /* HB_UNICODE_COMBINING_CLASS_DOUBLE_BELOW */
   234, /* HB_UNICODE_COMBINING_CLASS_DOUBLE_ABOVE */
   235, 236, 237, 238, 239,
   240, /* HB_UNICODE_COMBINING_CLASS_IOTA_SUBSCRIPT */
   241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254,
   255, /* HB_UNICODE_COMBINING_CLASS_INVALID */
 };