GitLab

Notification title has 2-line limit, therefore sometimes long
messages are cut off. The 'body' field has much more space for
longer text.

BUG=454827
R=oshima@chromium.org
TEST=manually

Review URL: https://codereview.chromium.org/1094863006

Cr-Commit-Position: refs/heads/master@{#326692}