GitLab

When the keyboard shortcut is used to move the active window
from current desk to desk on left/right, we animate it towards
the direction of the target desk until it goes offscreen.

Demo: https://bugs.chromium.org/p/chromium/issues/detail?id=977434#c4

BUG=977434, 866622
TEST=Manually

Change-Id: Ia86f493afe997ca640f923acc24fcb5bc3b3027c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1705516
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678476}