fast/text/international/arabic-justify.html fast/text/khmer-lao-font.html platform/mac/editing/input/devanagari-ligature.html
Possibly related: https://trac.webkit.org/changeset/187707
Rolled out in http://trac.webkit.org/changeset/187802
http://trac.webkit.org/changeset/187802 seemed to fix it