Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

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

Index: third_party/harfbuzz-ng/src/hb-ot-shape.h
diff --git a/third_party/harfbuzz-ng/src/hb-ot-shape.h b/third_party/harfbuzz-ng/src/hb-ot-shape.h
index c90e0fea5196ee43aa6a90dbb9c0a64916e07c14..1897e8458e5522ad6bfdab60ae8f3bae6134c468 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-shape.h
+++ b/third_party/harfbuzz-ng/src/hb-ot-shape.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010  Red Hat, Inc.
+ * Copyright © 2010  Red Hat, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -27,18 +27,19 @@
 #ifndef HB_OT_SHAPE_H
 #define HB_OT_SHAPE_H
 
+#include "hb-common.h"
 #include "hb-shape.h"
 
 
 HB_BEGIN_DECLS
 
 
-void
+hb_bool_t
 hb_ot_shape (hb_font_t          *font,
-	     hb_face_t          *face,
 	     hb_buffer_t        *buffer,
-	     const hb_feature_t *user_features,
-	     unsigned int        num_user_features);
+	     const hb_feature_t *features,
+	     unsigned int        num_features,
+	     const char * const *shaper_options);
 
 
 HB_END_DECLS