Add dominickn to bookmark_app_* OWNERS.

BUG=None

Change-Id: Iaa8eebeef8cb9169255918bf299562fa83926d4f
Reviewed-on: https://chromium-review.googlesource.com/c/1440802Reviewed-by: Ben Wells <benwells@chromium.org>
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626946}

chrome/browser/extensions/OWNERS

@@ -4,6 +4,7 @@ per-file *networking*=stevenjb@chromium.org
 per-file *networking*=tbarzic@chromium.org
 
 per-file bookmark_app_*=calamity@chromium.org
+per-file bookmark_app_*=dominickn@chromium.org
 per-file bookmark_app_*=mgiuca@chromium.org
 per-file bookmark_app_*=ortuno@chromium.org