Rebaseline low latency canvas2d pixel test

A recent Skia roll made changes to rectangle anti-aliasing. Rebaselining
per Skia owners recommendation. Will reenable test in followup CL.

TBR=kbr@chromium.org

Bug: 914206
Change-Id: I22d1982b6a73c79a3f198370c2f25b47e11ed2bc
Reviewed-on: https://chromium-review.googlesource.com/c/1374512
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616057}
2 files changed