Port to webkit2gtk 4.0
See also: http://webkitgtk.org/security/WSA-2015-0002.html
And: https://blogs.gnome.org/mcatanzaro/2016/02/01/on-webkit-security-updates/
Sounds like this depends on https://bugs.launchpad.net/pantheon-mail/+bug/1519476
Bug watches keep track of this bug in other bug trackers.
See also: http:// webkitgtk. org/security/ WSA-2015- 0002.html
And: https:/ /blogs. gnome.org/ mcatanzaro/ 2016/02/ 01/on-webkit- security- updates/