Roll HarfBuzz to 1.4.6

third_party/harfbuzz-ng/src/hb-ot-shape.cc

Index: third_party/harfbuzz-ng/src/hb-ot-shape.cc
diff --git a/third_party/harfbuzz-ng/src/hb-ot-shape.cc b/third_party/harfbuzz-ng/src/hb-ot-shape.cc
index 6b38739c91b6942c3cd8032ce9701528ad031074..29f5e58e519ac9ffbcc395215b7bb3c78382afc2 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-shape.cc
+++ b/third_party/harfbuzz-ng/src/hb-ot-shape.cc
@@ -128,6 +128,8 @@ hb_ot_shape_collect_features (hb_ot_shape_planner_t          *planner,
  * shaper face data
  */
 
+HB_SHAPER_DATA_ENSURE_DEFINE(ot, face)
+
 hb_ot_shaper_face_data_t *
 _hb_ot_shaper_face_data_create (hb_face_t *face)
 {
@@ -145,6 +147,8 @@ _hb_ot_shaper_face_data_destroy (hb_ot_shaper_face_data_t *data)
  * shaper font data
  */
 
+HB_SHAPER_DATA_ENSURE_DEFINE(ot, font)
+
 struct hb_ot_shaper_font_data_t {};
 
 hb_ot_shaper_font_data_t *
@@ -374,7 +378,6 @@ hb_ot_shape_setup_masks_fraction (hb_ot_shape_context_t *c)
     post_mask = c->plan->numr_mask | c->plan->frac_mask;
   }
 
-  /* TODO look in pre/post context text also. */
   unsigned int count = buffer->len;
   hb_glyph_info_t *info = buffer->info;
   for (unsigned int i = 0; i < count; i++)