Try 2 for Gauss filter calculation

Originally reviewed at:
https://skia-review.googlesource.com/c/skia/+/67723

Change-Id: Ie62d81f818899f3a79df888c1594d3fbccf6d414
Reviewed-on: https://skia-review.googlesource.com/69681
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
5 files changed