Use SkUniqueCFRef with CTTypesetterCreateLine

This is a 'Create' and returns a reference. Be sure to release the
reference.

Bug: skia:10542
Change-Id: If4ed7a37a43efe5f8f17a4a15a0f82cdae7d9276
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307795
Auto-Submit: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Herb Derby <herb@google.com>
1 file changed