WPT import https://crrev.com/c/1142744 introduced new failures in external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox:


List of new failures:

external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-safe-overflow-position-001.html [ Failure ]


This import contains upstream changes from 70afecf33059eab74cd92d97822386955e905a10 to e26d876c1d00674a9f6b8f29f6fb32a794cd536e:

Sync Mozilla tests as of https://hg.mozilla.org/mozilla-central/rev/8dab948a10f073a46f13f55f94d1f6514c7360ac . (#12064): https://github.com/web-platform-tests/wpt/commit/e26d876c1d00674a9f6b8f29f6fb32a794cd536e [affecting this directory]
Reland "Adjusted references in tests to match new helper.sub.js file": https://github.com/web-platform-tests/wpt/commit/81d058b07f1dacf0445eb4bd20a7df14f8961185
SecurityPolicyViolationEvent.blockedURI should contain the original URL in case of redirects: https://github.com/web-platform-tests/wpt/commit/50ff428b9c1e5a93bf910190ef226283389f1004
Disable kerning for css/css-pseudo/first-letter-opacity-float-001.html: https://github.com/web-platform-tests/wpt/commit/73160366b3f95a16226623ad26285cad8c1718ae [affecting this directory]
Update the web-platform-tests for the Web Audio API to expect the right kind of type error.: https://github.com/web-platform-tests/wpt/commit/1a193d9759be413776fe215dc4167c0923d5e83b
Update web-platform-test's audit.js file throw() method to be able to pass in exactly the error or exception to expect.: https://github.com/web-platform-tests/wpt/commit/93e946525ec8a87e973aa3fb867ab0b908aaaa6c
Explicitely label the assertions for DelayNode.delayTime tests, and test the error type.: https://github.com/web-platform-tests/wpt/commit/2a5f1e56099f5808efb65a7af0c89849233d3d92


(Manually filing because of  issue 865385 )