Update from https://crrev.com/316786

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

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2011  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
  * above copyright notice and the following two paragraphs appear in
@@ skipping 364 matching lines @@
     {
 #define HB_UNICODE_FUNC_IMPLEMENT(name) hb_glib_unicode_##name,
       HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS
 #undef HB_UNICODE_FUNC_IMPLEMENT
     }
   };
 
   return const_cast<hb_unicode_funcs_t *> (&_hb_glib_unicode_funcs);
 }
 
+hb_blob_t *
+hb_glib_blob_create (GBytes *gbytes)
+{
+  gsize size = 0;
+  gconstpointer data = g_bytes_get_data (gbytes, &size);
+  return hb_blob_create ((const char *) data,
+                         size,
+                         HB_MEMORY_MODE_READONLY,
+                         g_bytes_ref (gbytes),
+                         (hb_destroy_func_t) g_bytes_unref);
+}