www/chromium: update to 80.0.3987.149

[cem]

Summary

The Chrome stable channel has been updated to 80.0.3987.149[1].

This update includes 13 security fixes, including 9 Sev:High reports from
external researchers.

[1]: https://chromereleases.googleblog.com/2020/03/stable-channel-update-for-desktop_18.html

[cem]

Drop unintentional WIP that moved renderer to unexpected thread, breaking video
playback.

[jrm]

Nice. Running some poudriere testports for 11/12 i386/amd64: http://pkg.awarnach.mathstat.dal.ca/

[cem]

In D24169#531493, @jrm wrote:

Nice. Running some poudriere testports for 11/12 i386/amd64: http://pkg.awarnach.mathstat.dal.ca/

Thanks. The changes are fairly small in this one (all existing patches applied cleanly).

[cem]

Drop openh264 change, we use the unbundler to use system openh264.

[jrm]

poudriere testport looks good.