Looks like GTK+ needs to rebaseline some of its window property expected results. The following tests started failing on GTK Linux 64-bit Debug between r100159 and r100162 (inclusive): fast/js/global-constructors.html fast/dom/Window/window-property-descriptors.html fast/dom/Window/window-properties.html fast/dom/prototype-inheritance-2.html fast/dom/constructed-objects-prototypes.html http://trac.webkit.org/log/trunk?rev=100162&stop_rev=100159&limit=5 http://build.webkit.org/results/GTK%20Linux%2064-bit%20Debug/r100158%20(27619)/results.html passed http://build.webkit.org/results/GTK%20Linux%2064-bit%20Debug/r100162%20(27620)/results.html failed
Committed r100179: <http://trac.webkit.org/changeset/100179>
Previous commit added the failing tests to the platform/gtk/Skipped list.
Those need a rebaseline, it's as simple as webkit-patch rebaseline and follow the instructions. It'd be great to do that in the future if a similar situation happens :)
Committed r100272: <http://trac.webkit.org/changeset/100272>