GitLab

Button class has its own focus ring. When a custom focus ring is
installed, remove the stock one.

Bug: 1107498
Change-Id: I5342e41eba04042c921868a22181fdfb9ff3d9ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511470Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823735}