GitLab

Dragging a tab group around acts the same as dragging a tab. The
dragged tab group takes the index of the tab or group it is being
dragged over.

Bug: 1027373
Change-Id: Ie70883a16330e09732e1bad02e2112d2511cb51e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2018499
Commit-Queue: John Lee <johntlee@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735632}