GitLab

For multi-display dragging from overview, there shall be a drop target
in the display being dragged in.

Test: manual
Bug: 961170
Change-Id: If8439a301310f82896a776589c3d6be751b9504e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1972297Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Commit-Queue: Avery Musbach <amusbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726184}