- Fixes CVE-2016-1612 CVE-2016-1613 CVE-2016-1614 CVE-2016-1615
CVE-2016-1616 CVE-2016-1617 CVE-2016-1618 CVE-2016-1619 CVE-2016-1620.
- Moves chromium stable and beta channels up one version major.
vcunat made dev channel stay for now, as it wouldn't download otherwise.
This is most of PR #12717.