GitLab

This addresses a TODO where I noticed that the InfoBArService API has
no notion of a tab and in some implementations might not be tied to a
tab.

TBR=trivialusageupdates@chromium.org
BUG=140037

Review URL: https://chromiumcodereview.appspot.com/10879037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@154023 0039d316-1c4b-4281-b951-d872f2087c98