GitLab

Currently when clicking on the "Review" button, on Mac, it will always
not navigate to the expected URL. On Debian, sometimes nothing happens.

On Mac, if the notification has no origin, then click event will not be
forwarded to NotificationHandler. This CL removes the origin check.

Also changed the URL navigation API used to open the URL.

TBR=dtrainor@chromium.org, peter@chromium.org

Bug: 1042124
Change-Id: Ife2c1a5e5949b1d933e4048dfa11a62144ba6bc3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2023747Reviewed-by: Xing Liu <xingliu@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735736}