GitLab

This is a follow-up of crrev.com/c/1306969. After that change it showed
the tooltip for power status even when hovering on other parts of the
tray.

Bug: 888072
Change-Id: I26c5786a8ff19347f2eb58dd1430e2d5ea66d066
Reviewed-on: https://chromium-review.googlesource.com/c/1308961Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604204}