Add OWNERS for c/b/ui/views/profiles/.

Bug: none
Change-Id: I3c9d49ca54ab9520b3779ce42f702a2d127343b9
Reviewed-on: https://chromium-review.googlesource.com/c/1303047Reviewed-by: Peter Boström <pbos@chromium.org>
Reviewed-by: Thomas Tangl <tangltom@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604742}

chrome/browser/ui/views/profiles/OWNERS

+pbos@chromium.org
+tangltom@chromium.org
+
+# COMPONENT: UI>Browser>Toolbar