GitLab

Before this change the bubble was shown above the system tray icons
even when the shelf position was left or right.

Bug: 864929
Test: manual
Change-Id: I8258705be68a85af32aa7d46943ef32a46ee8c9a
Reviewed-on: https://chromium-review.googlesource.com/1141750Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576382}