WPT import https://crrev.com/c/1186549 introduced new failures in external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0:

List of new failures:
external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-display.html new failing tests: https://crrev.com/c/1186549/4/third_party/WebKit/LayoutTests/external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-display-expected.txt
[ Mac ] external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-grid-flex-multicol.html new failing tests: https://crrev.com/c/1186549/4/third_party/WebKit/LayoutTests/platform/mac/external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-grid-flex-multicol-expected.txt
[ Win ] external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-grid-flex-multicol.html new failing tests: https://crrev.com/c/1186549/4/third_party/WebKit/LayoutTests/platform/win/external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/legend-grid-flex-multicol-expected.txt
external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/fieldset-containing-block.html [ Failure ]

This import contains upstream changes from 4da456ddbb7fd4572b39f14a475187d77d0a1922 to b8a706eb885495b76b81e08d73d45717aaedf116:
Added tests for the H2 parts in server.py: https://github.com/web-platform-tests/wpt/commit/b8a706eb885495b76b81e08d73d45717aaedf116
Fixed minor issue where. `recv` receiving empty string indicates socket closed/error: https://github.com/web-platform-tests/wpt/commit/441e12da8fde93815d9ae37895b66207b5d2400e
Added log error message that will print if user requests the h2 server to start but the environment is incompatible.: https://github.com/web-platform-tests/wpt/commit/61f0d3426300cb71c16c5f43595449ed4e237275
HTML: test fieldset with shadow DOM and display: contents: https://github.com/web-platform-tests/wpt/commit/69e18d06f5030e3567dcf323e24452c7f4b5f6df [affecting this directory]
HTML: update crbug number: https://github.com/web-platform-tests/wpt/commit/13334625a17ad86eab71fec9362453acf4f81ab4 [affecting this directory]
HTML: test fieldset's border gap: https://github.com/web-platform-tests/wpt/commit/a68b451920b32057c705d614874ac1392536dd9b [affecting this directory]
HTML: fieldset containing block when it has a legend: https://github.com/web-platform-tests/wpt/commit/e604b5eea249e02002e725319fd43904c4cbe377 [affecting this directory]
HTML: fieldset's "rendered legend" used value of display is block: https://github.com/web-platform-tests/wpt/commit/0e10a5e47320a06c6f049fabcdfc6bd36922dc83 [affecting this directory]
HTML: test fieldset's legend with float and position: https://github.com/web-platform-tests/wpt/commit/4e8f6447b95290f9f31e478837c66ec26adc1e4e [affecting this directory]
HTML: test flexbox/grid/multicol on fieldset's legend: https://github.com/web-platform-tests/wpt/commit/f0d9781d64a016c49e0f12a874e07f5598d2262f [affecting this directory]
Make common/dummy.xhtml actually an XHTML document (#12637): https://github.com/web-platform-tests/wpt/commit/f0a336477c36ef6c8b7e26ce9eb8eecc000168f5
Add a test for text-decoration in tables quirk: https://github.com/web-platform-tests/wpt/commit/f4b8c1ed158c79fdb30ed70b2824da295f524755
Skip some textual lints for *.bmp: https://github.com/web-platform-tests/wpt/commit/2845cc57d5d031b87ead22733983b4a49b2855e0
Align Document::open() and close() further with the spec: https://github.com/web-platform-tests/wpt/commit/f837e221ee1050947223bb08b3643ae4da902375 [affecting this directory]
Test ServiceWorkerContainer.register() with a data: URL: https://github.com/web-platform-tests/wpt/commit/1a63329ad155c08882c225190cc8d2bff9894243
Reland "Move XR LayoutTests over to be WPTs": https://github.com/web-platform-tests/wpt/commit/50d6ee076e94273080d9f3b69be0bf4eeae156d3
Correct WebXR idlharness test: https://github.com/web-platform-tests/wpt/commit/1aace0320ac65ead4f7569484fab741e6fdfb81d