GitLab

With the ongoing interactivity improvements to the window cycle list
(alt-tab) three finger horizontal trackpad scrolling was introduced as
a way for users to cycle the window cycle list. However, if the user's
most recent active window was a chrome window with multiple tabs, the
three finger swipes would also tab scrub.

To prevent both tab scrubbing and window cycle list cycling, this CL
disables tab scrubbing while a user is cycling windows.

Tests: manual + added test
Bug: 1067327
Change-Id: Ic1ffd1152c3082c2cbc4ab198f5bf0f0c4540037
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2437155
Commit-Queue: Jeremy Chinsen <chinsenj@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812304}