-webkit-columns is set to "rosybrown" in the test. This makes no sense, will be ignored, and the usage of column layout does not seem to be related to the test itself. So probably a copy&paste mistake.
Created attachment 199638 [details] no-webkit-columns.diff
Comment on attachment 199638 [details] no-webkit-columns.diff Makes sense.
Comment on attachment 199638 [details] no-webkit-columns.diff Clearing flags on attachment: 199638 Committed r149939: <http://trac.webkit.org/changeset/149939>
All reviewed patches have been landed. Closing bug.