GitLab

- InfobarBadgeTabHelper observes InfoBarManagerObserver for any Infobars
that were presented or removed.
- If the Infobar is a Message we will let the delegate know so it displays
a badge.


Bug: 911864
Change-Id: I3569efe9c982c1d473368ca199ce2a65251ce197
Reviewed-on: https://chromium-review.googlesource.com/c/1487797Reviewed-by: Peter Lee <pkl@chromium.org>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635917}