GitLab

Changes in this CL:
- added a drop shadow
- added a divider at the top of the accessory sheet
- centered text for accessory options (e.g. Manage passwords...)

Bug: 856180, 887258
Change-Id: I7b71670ef551d8d5f86501ba47011ae590323676
Reviewed-on: https://chromium-review.googlesource.com/1225803
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Reviewed-by: Friedrich Horschig [CEST] <fhorschig@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592727}