GitLab

Use BrowserListObserver::OnBrowserAdded instead.

Bug: 268984
Change-Id: Ib006156034fb7b3b52d8c0ecad7f0189fe91e08e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1715097Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680506}