Fix compositor GMs on Intel Metal

Bug: skia:8243
Change-Id: Ifd27365014e89a39bc24ec59d2478c5a688c55b8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211592
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: Jim Van Verth <jvanverth@google.com>
1 file changed