WPT import https://crrev.com/c/1232197 introduced new failures in external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements:

List of new failures:
external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-align-justify-self.html new failing tests: https://crrev.com/c/1232197/4/third_party/WebKit/LayoutTests/external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-align-justify-self-expected.txt
external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-percentage-block-size.html new failing tests: https://crrev.com/c/1232197/4/third_party/WebKit/LayoutTests/external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-percentage-block-size-expected.txt
external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-block-margins.html [ Failure ]
external/wpt/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-display-rendering.html [ Failure ]

This import contains upstream changes from faa0fd6c48497daadc4d4da0d1519cce484b5af5 to 67f4b4df5a830b34ba3e30f24660f188fbdeba65:
Sync Mozilla CSS tests as of https://hg.mozilla.org/mozilla-central/rev/3701bbe68f257a13322bb30f3898230ca2779e54 . (#13056): https://github.com/web-platform-tests/wpt/commit/67f4b4df5a830b34ba3e30f24660f188fbdeba65
Throw SyntaxError on empty urls in iceServers and switch to real SyntaxError over DOMException, + update WPT.: https://github.com/web-platform-tests/wpt/commit/da5c4a5d34b8b9873d2fdbeec4b2fc3aa11ae655
HTML: test fieldset percentage block size: https://github.com/web-platform-tests/wpt/commit/c4998afb119a14386c5645e0d1a7c90954849dab [affecting this directory]
HTML: test rendering of legend with different display values: https://github.com/web-platform-tests/wpt/commit/a0d4be661b5c006fe64b42fe08aeb992668052ac [affecting this directory]
HTML: test inline margin on fieldset's legend: https://github.com/web-platform-tests/wpt/commit/c033091462612c88abe00a81162e230ce2069b24 [affecting this directory]
[Background Fetch] Remove dangling markup test: https://github.com/web-platform-tests/wpt/commit/faff61888337ce764d0170a81218d13ae53f5cfb
CSS: path string computed style uses absolute commands: https://github.com/web-platform-tests/wpt/commit/9b900a584259526b6927565fa010d4036c1224af
[Image Capture] Add exposureTime constraint.: https://github.com/web-platform-tests/wpt/commit/397f3e38fe8d7383b303cb18a388b55a7ddf2e1b
Call capture event listeners in capturing phase at shadow hosts: https://github.com/web-platform-tests/wpt/commit/9d63cfd82f428a999fb3cacffb2f940faa6a6b64
Allow integer division inside calc() expressions.: https://github.com/web-platform-tests/wpt/commit/8f8ff0e2a61f2a24996404921fe853cb1fd9b432
Direct dispatch mouse pointer event by MEM and PEM: https://github.com/web-platform-tests/wpt/commit/d4c197a71c0777e839b65c17a59da12b6ddd8d0d
HTML: legend align maps to 'justify-self': https://github.com/web-platform-tests/wpt/commit/51ceab16ec539fd421322727f93a847f7855e317 [affecting this directory]
HTML: Test block margins on legend: https://github.com/web-platform-tests/wpt/commit/e40235366bbd17f42e23e0177352c5f52c655909 [affecting this directory]