Should remove from hotlists since Incognito only. 

Done

This seems to be only reproducing on device.

Problem seems to be that when the second animation is terminating, there is a gap between the completion handler and the end of the autoreversed animation.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/81dc3d48490a10773cec0a0b64081608a7614f2a

commit 81dc3d48490a10773cec0a0b64081608a7614f2a
Author: Gregory Chatzinoff <gchatz@chromium.org>
Date: Wed Jan 03 23:32:24 2018

Fix flickering tools menu item animation.

The tools menu item animation that is triggered after the dismissal of
the Incognito In Product Help Bubble flickers at the end. This happens
because there is a gap between the end of the autoreversed animation
(where the item has a highlighted background) and the completion handler
(which sets the item to a white background). The fix is to use a
CABasicAnimation instead of |animateWithDuration|.

Bug:  767202 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I79d57ecf7e77281e9d6d112a66e8e7d20efcccef
Reviewed-on: https://chromium-review.googlesource.com/849176
Commit-Queue: edchin <edchin@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526861}
[modify] https://crrev.com/81dc3d48490a10773cec0a0b64081608a7614f2a/ios/chrome/browser/ui/tools_menu/tools_menu_view_controller.mm