Yeah, that's probably high reward for relatively little effort. Long term, it would of course be even more awesome if we could all contribute to web-platform-tests more easily and thus share tests also with Gecko and Edge.

It sounds like (re: foolip) the better option is to upstream the tests that only exist in WebKit to the web-platform-tests, which would then be automatically imported into Chromium.

The first step is probably to generate a list of tests found in WebKit but not in Chromium.

Note that there may be licensing complications if one attempts this at any scale. If anyone wants to work on this, talk to rbyers@ and dknox@ about that first :)

Yeah it's an interesting idea but Apple seems pretty motivated (along with the other vendors) to invest more in web-platform-tests so that seems like the clear right long-term solution.

There's also a resource concern.  Infra folks are already concerned that running all of WPT is a waste of resources when there's a bunch of redundancy with LayoutTests.  I think it's critical that we address that concern first (i.e. by removing LayoutTests which are completely redundant with WPT test coverage).

It sounds like whatever we do, we'll have to coordinate with Apple. We could add this topic to the list of discussion points for the 1/30 convergence?