Roll HarfBuzz to 1.4.6

third_party/harfbuzz-ng/src/hb-ot-shape-complex-private.hh

 /*
  * 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
  * above copyright notice and the following two paragraphs appear in
  * all copies of this software.
@@ skipping 173 matching lines @@
     case HB_SCRIPT_NKO:
     case HB_SCRIPT_PHAGS_PA:
 
     /* Unicode-6.0 additions */
     case HB_SCRIPT_MANDAIC:
 
     /* Unicode-7.0 additions */
     case HB_SCRIPT_MANICHAEAN:
     case HB_SCRIPT_PSALTER_PAHLAVI:
 
+    /* Unicode-9.0 additions */
+    case HB_SCRIPT_ADLAM:
+
       /* For Arabic script, use the Arabic shaper even if no OT script tag was found.
        * This is because we do fallback shaping for Arabic script (and not others).
        * But note that Arabic shaping is applicable only to horizontal layout; for
        * vertical text, just use the generic shaper instead. */
       if ((planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT ||
            planner->props.script == HB_SCRIPT_ARABIC) &&
           HB_DIRECTION_IS_HORIZONTAL(planner->props.direction))
         return &_hb_ot_complex_shaper_arabic;
       else
         return &_hb_ot_complex_shaper_default;
@@ skipping 161 matching lines @@
        * GSUB/GPOS needed, so there may be no scripts found! */
       if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T'))
         return &_hb_ot_complex_shaper_default;
       else
         return &_hb_ot_complex_shaper_use;
   }
 }
 
 
 #endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */