WPT import https://crrev.com/c/1162965 introduced new failures in external/wpt/css:

List of new failures:
external/wpt/css/css-pseudo/idlharness.html new failing tests: https://crrev.com/c/1162965/4/third_party/WebKit/LayoutTests/external/wpt/css/css-pseudo/idlharness-expected.txt

This import contains upstream changes from 1413fe6af9472fe030b368e3297e6f618797cec3 to f4e5090a404df6782535851740b4b58e68b7ab5b:
Rename VRDisplayHost to XRDeviceImpl: https://github.com/web-platform-tests/wpt/commit/f4e5090a404df6782535851740b4b58e68b7ab5b
Clean up the DOM-Parsing IDL test (#11863): https://github.com/web-platform-tests/wpt/commit/5f63e2363db5f444e92171d53455b645769c7e15
Add the intersection-observer IDL file + test (#11858): https://github.com/web-platform-tests/wpt/commit/9643ddb5e855882b66481083e544d4c90f3844da
Update the css-pseudo IDL test (#11854): https://github.com/web-platform-tests/wpt/commit/23ce5b91262c0126d60128890138e4dc3d2ef70c [affecting this directory]
Update the filter-effects IDL file (#11825): https://github.com/web-platform-tests/wpt/commit/34052b95a2235dee0632cf1649112cf129cf7c18
Update the hr-time IDL file + test (#11862): https://github.com/web-platform-tests/wpt/commit/0bf08b6c2bc6a13f606b58895bc95f7276a45a54
Add the webmidi IDL file + test (#9841): https://github.com/web-platform-tests/wpt/commit/e9a34c1752ba4c3c9a19d9f226d240af83be1fad
Performance object must be reset when the inner window changes document - WPT: https://github.com/web-platform-tests/wpt/commit/28888f6819f4ab5f64f6ac958f40e38c9c49082b
Update the css-conditional IDL file (#11868): https://github.com/web-platform-tests/wpt/commit/e96b5d88ba0a6bf67c1fe7cbdf5765a7f45a8ce3
Update the html-media-capture IDL file + test (#11865): https://github.com/web-platform-tests/wpt/commit/2fd46a54289a7610e90a424fb579ab8ef44aafa2