This flag was repurposed... the real thing we're rebaselining
is https://skia-review.googlesource.com/c/skia/+/167264, which
affects situations with solid colors and unusual blend modes.

Change-Id: I1da6486ca54d5f6c60bb0b04db05f6dc92487039
Reviewed-on: https://chromium-review.googlesource.com/c/1316754
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605216}