The following layout test is failing on [GTK] fast/images/pdf-as-image-with-annotations.html It was introduced in r155069 <http://trac.webkit.org/changeset/155069>, but I don't think we have the proper support in the GTK port. See bug #120651 for additional details.
This patch landed again in r155461 with lesser changes. It fails on Qt bots too, so I will add [Qt] mark to this bug.