Add test for baseline snapping.

Change-Id: I895218ba087d2f04ee92bc6eaaaad780723a9202
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/237803
Auto-Submit: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
3 files changed