WPT import https://crrev.com/c/1002452 introduced new failures in external/wpt/compat:

List of new failures:
external/wpt/compat/interfaces.any.html new failing tests: https://crrev.com/c/1002452/4/third_party/WebKit/LayoutTests/external/wpt/compat/interfaces.any-expected.txt

This import contains upstream changes from 318f2876ef4b288bb805f855c679dc1b583d8475 to 8c503e75150f239ea2884392d26740a284859d1c:
Add test for case insensitivity for content: attr() identifiers in html documents.: https://github.com/w3c/web-platform-tests/commit/8c503e75150f239ea2884392d26740a284859d1c
Respect ::selection background styles for image overlays.: https://github.com/w3c/web-platform-tests/commit/99e1ae22844bda5dfc8a42b459065daa608a7ad4
Update the StructuredCloneAlgorithm to follow the latest version of the spec, bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1441141 gecko-commit: 9890a67387378b2417e135a57bd0a6727a578cb6 gecko-integration-branch: central gecko-reviewers: smaug, sfink: https://github.com/w3c/web-platform-tests/commit/13d36e4d3201c13873b3451923071d3345a30cdc
[css-typed-om] Implement support for text-* properties.: https://github.com/w3c/web-platform-tests/commit/8a4cdaf6df416d33c0b2cb591fb078d7448591db