The texture resource in MtlTextureInfo is a CoreFoundation object,
so we have to manage the refcounting ourselves. GrCFResource is a
wrapper class which will automatically take care of this for us on
creation, assignment, and destruction.
Bug: chromium:964498
Change-Id: I9a3768833744d4aaaec2142200283f0e7eaad165
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/216351
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Christopher Cameron <ccameron@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
dac1e55862