Roll Chrome into Mojo.

third_party/harfbuzz-ng/gsubgpos.patch

Index: third_party/harfbuzz-ng/gsubgpos.patch
diff --git a/third_party/harfbuzz-ng/gsubgpos.patch b/third_party/harfbuzz-ng/gsubgpos.patch
deleted file mode 100644
index 47709f1126d0f11e7bc011230b5a322c23af98f8..0000000000000000000000000000000000000000
--- a/third_party/harfbuzz-ng/gsubgpos.patch
+++ /dev/null
@@ -1,20 +0,0 @@
-diff --git a/src/hb-ot-layout-gsubgpos-private.hh b/src/hb-ot-layout-gsubgpos-private.hh
-index 6ff15d2..dafca7f 100644
---- a/src/hb-ot-layout-gsubgpos-private.hh
-+++ b/src/hb-ot-layout-gsubgpos-private.hh
-@@ -1498,6 +1498,7 @@ struct ContextFormat3
-     TRACE_SANITIZE (this);
-     if (!c->check_struct (this)) return TRACE_RETURN (false);
-     unsigned int count = glyphCount;
-+    if (!count) return TRACE_RETURN (false); /* We want to access coverage[0] freely. */
-     if (!c->check_array (coverage, coverage[0].static_size, count)) return TRACE_RETURN (false);
-     for (unsigned int i = 0; i < count; i++)
-       if (!coverage[i].sanitize (c, this)) return TRACE_RETURN (false);
-@@ -2109,6 +2110,7 @@ struct ChainContextFormat3
-     if (!backtrack.sanitize (c, this)) return TRACE_RETURN (false);
-     OffsetArrayOf<Coverage> &input = StructAfter<OffsetArrayOf<Coverage> > (backtrack);
-     if (!input.sanitize (c, this)) return TRACE_RETURN (false);
-+    if (!input.len) return TRACE_RETURN (false); /* To be consistent with Context. */
-     OffsetArrayOf<Coverage> &lookahead = StructAfter<OffsetArrayOf<Coverage> > (input);
-     if (!lookahead.sanitize (c, this)) return TRACE_RETURN (false);
-     ArrayOf<LookupRecord> &lookup = StructAfter<ArrayOf<LookupRecord> > (lookahead);