Share code handling legacy SkFilterQuality

Change-Id: Idfd3b96896d7fa2cdcf9127b4d30e2fc29bcab79
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337436
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed