The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f29c539e990b1a737642c5cfa3d53b6e8d93ba8e

commit f29c539e990b1a737642c5cfa3d53b6e8d93ba8e
Author: Robert Liao <robliao@chromium.org>
Date: Wed Mar 21 16:41:47 2018

Disable Visibility Animations for interactive_ui_tests ConstrainedWindowViewTest

ConstrainedWindowViewTest.[TabMoveTest|ClosesOnEscape] are flaky on Mac
when animations are enabled.

BUG= 823909 

Change-Id: I53b5a042874e56aec0b2b82cc2e0d5a3a0e8a402
Reviewed-on: https://chromium-review.googlesource.com/972359
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544732}
[modify] https://crrev.com/f29c539e990b1a737642c5cfa3d53b6e8d93ba8e/chrome/browser/ui/views/constrained_window_views_browsertest.cc

This is a test only failure. Reassessing as P2.

Looking at the test, animations aren't critical for the functionality, so it's probably fine to keep this disabled.

If there are objections, feel free to reopen!