The ATK 2.8.0 version is required for layout tests to work properly.
The at-spi2-atk and at-spi2-core versions should be bumped accordingly as there are currently crashes occurring on the GTK builders in libatk-bridge.so (provided by at-spi2-atk) that can most likely be attributed due to the builders having ATK 2.8 installed system-wide yet only using 2.5.3 versions of at-spi2-atk and at-spi2-core.
Created attachment 196383 [details]
Comment on attachment 196383 [details]
Thanks for the review.
The crashes are not occurring locally, hopefully the builders will get fixed as well.
Committed r147574: <http://trac.webkit.org/changeset/147574>