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This change introduces a new ash::features to enable indicators when a
user has difficulty moving their mouse between displays and when a user
moves displays around in display layouts.

Continuation of CL: crrev.com/c/2145792

Bug: 1070122
Change-Id: I85c52c42abc03f96600efa3877a758ef0d1cf853
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2158033Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761140}