GitLab

Check for the sys tray when checking if an event is within the shelf
window. Also added a test.
TEST=automated

Bug: 1006032
Change-Id: I1e36b8d4ce761d7cebce8c0e5f312ea881ec23e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1825485
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Manu Cornet <manucornet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700330}