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diff --git a/gfx/harfbuzz/src/hb-ot-layout-gsub-table.hh b/gfx/harfbuzz/src/hb-ot-layout-gsub-table.hh
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+++ b/gfx/harfbuzz/src/hb-ot-layout-gsub-table.hh
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+/*
+ * Copyright © 2007,2008,2009,2010  Red Hat, Inc.
+ * Copyright © 2010,2012,2013  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.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_LAYOUT_GSUB_TABLE_HH
+#define HB_OT_LAYOUT_GSUB_TABLE_HH
+
+#include "OT/Layout/GSUB/GSUB.hh"
+
+namespace OT {
+namespace Layout {
+namespace GSUB_impl {
+
+// TODO(garretrieger): Move into the new layout directory.
+/* Out-of-class implementation for methods recursing */
+
+#ifndef HB_NO_OT_LAYOUT
+/*static*/ inline bool ExtensionSubst::is_reverse () const
+{
+  return SubstLookup::lookup_type_is_reverse (get_type ());
+}
+template <typename context_t>
+/*static*/ typename context_t::return_t SubstLookup::dispatch_recurse_func (context_t *c, unsigned int lookup_index)
+{
+  const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (lookup_index);
+  return l.dispatch (c);
+}
+
+/*static*/ typename hb_closure_context_t::return_t SubstLookup::closure_glyphs_recurse_func (hb_closure_context_t *c, unsigned lookup_index, hb_set_t *covered_seq_indices, unsigned seq_index, unsigned end_index)
+{
+  const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (lookup_index);
+  if (l.may_have_non_1to1 ())
+      hb_set_add_range (covered_seq_indices, seq_index, end_index);
+  return l.dispatch (c);
+}
+
+template <>
+inline hb_closure_lookups_context_t::return_t
+SubstLookup::dispatch_recurse_func<hb_closure_lookups_context_t> (hb_closure_lookups_context_t *c, unsigned this_index)
+{
+  const SubstLookup &l = c->face->table.GSUB.get_relaxed ()->table->get_lookup (this_index);
+  return l.closure_lookups (c, this_index);
+}
+
+template <>
+inline bool SubstLookup::dispatch_recurse_func<hb_ot_apply_context_t> (hb_ot_apply_context_t *c, unsigned int lookup_index)
+{
+  auto *gsub = c->face->table.GSUB.get_relaxed ();
+  const SubstLookup &l = gsub->table->get_lookup (lookup_index);
+  unsigned int saved_lookup_props = c->lookup_props;
+  unsigned int saved_lookup_index = c->lookup_index;
+  c->set_lookup_index (lookup_index);
+  c->set_lookup_props (l.get_props ());
+
+  bool ret = false;
+  auto *accel = gsub->get_accel (lookup_index);
+  ret = accel && accel->apply (c, l.get_subtable_count (), false);
+
+  c->set_lookup_index (saved_lookup_index);
+  c->set_lookup_props (saved_lookup_props);
+  return ret;
+}
+#endif
+
+} /* namespace GSUB_impl */
+} /* namespace Layout */
+} /* namespace OT */
+
+
+#endif /* HB_OT_LAYOUT_GSUB_TABLE_HH */