For armhf: make sure you use a 4GB builder, (locally i've been using the igepv5_4gb for beagleboard.org jessie image's)
ubuntu's chromium-44.0.2403.89-0ubuntu1.1195 builds fine in an sbuild for jessie, with this fstab addition: tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0 Regards, -- Robert Nelson https://rcn-ee.com/