GitLab

Remove focus ring on custom background dialog's done button when it is
disabled.

Bug: 878709
Change-Id: I9f30a27361682a6bb91273ae43cf97e1b1030594
Reviewed-on: https://chromium-review.googlesource.com/1196165
Commit-Queue: Weilun Shi <sweilun@chromium.org>
Reviewed-by: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588258}