GitLab

Tests that dragging a file over a directory tree item that can accept a
drop adds CSS class .accepts to that tree item.

Also: check that the drag hover causes the file-list to navigate to the
hovered tree item's directory.

Bug: 1002394
Change-Id: I4def2bfd5621b9043d615c0706cc273fc9eb16ec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2275576
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784396}