There are some wpt tests for the ">>" descendant selector, but I would like to remove them: https://github.com/w3c/web-platform-tests/pull/6785 Because no one implements this feature other than WebKit, and it's not clear we want to keep it in the spec: https://github.com/w3c/csswg-drafts/issues/641 This is just a heads-up so you can decide if you want to 1) copy the tests somewhere so you maintain test coverage for this feature, 2) not care about not having test coverage, 3) get rid of the feature.
This was https://bugs.webkit.org/show_bug.cgi?id=140525 Considering no one else implemented this and that the feature is rather obscure it is probably pretty safe to just remove it.
Created attachment 320259 [details] patch
Created attachment 320262 [details] patch
Created attachment 320265 [details] patch
Comment on attachment 320265 [details] patch rs=me Probably about time to get rid of the CSS_SELECTORS_LEVEL4 platform define as well.
It has some other stuff too but it is true that we probably don't need CSS_SELECTORS_LEVEL4.
Comment on attachment 320265 [details] patch Clearing flags on attachment: 320265 Committed r221788: <http://trac.webkit.org/changeset/221788>
All reviewed patches have been landed. Closing bug.
<rdar://problem/34332407>