WPT import https://crrev.com/c/1121689 introduced new failures in external/wpt/compat:

List of new failures:
[ Mac10.12 Mac10.13 ] external/wpt/compat/webkit-text-fill-color-property-002.html [ Failure ]

This import contains upstream changes from 8b8082f30267410e4b3729439be23df8b803dde8 to f83787eec8e9cea98eaa0ee760effd1cb3126d56:
Implement content: url(..) for elements.: https://github.com/web-platform-tests/wpt/commit/f83787eec8e9cea98eaa0ee760effd1cb3126d56
fix(resources/testdriver): correct syntax (#11743): https://github.com/web-platform-tests/wpt/commit/e2dcb12445c1e7dd01cf90a7a8302492cc3f3b59
Async Cookies: Update Cookie Store API to match spec.: https://github.com/web-platform-tests/wpt/commit/0e96b1f8627cf798ebea0c2a0cdf6b5d8cb8825e
Remove duplicate test keyboard-map-two-parallel-requests.https.html: https://github.com/web-platform-tests/wpt/commit/a2027fd6e9201443b5a86ad137cbb42869976ddc
[Squad] Generate ::before/::after/::backdrop in style recalc.: https://github.com/web-platform-tests/wpt/commit/ec35b03ca5e8eec6eb1767a77f0aea13855515a3
[LayoutNG] Allow epsilon when fitting into a line: https://github.com/web-platform-tests/wpt/commit/c360ca023dc5c341065de0f2814914b3c6004e4f