If an SkTypeface stream exists and is a memory based stream an hb_face
may be created directly from the memory. In this case the collection
index was set when the stream was retrieved and the hb_face is created
with this index. Otherwise, the hb_face is created by table callback. In
this case the stream may or may not have been successfully retrieved. If
the stream was successfully retrieved the hb_face index should be set to
the collection index retrieved with the stream. Otherwise, the hb_face
index should not be set.
Change-Id: I2568fecb1096d1a2e7f529342668ea443a8615c9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/499136
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
83c85affad