WPT import https://crrev.com/c/940881 introduced new failures in external/wpt/streams:

List of new failures:
[ Mac-mac10.12 ] external/wpt/streams/piping/error-propagation-forward.sharedworker.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/mac-mac10.12/external/wpt/streams/piping/error-propagation-forward.sharedworker-expected.txt
[ Win ] external/wpt/streams/piping/error-propagation-forward.sharedworker.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/win/external/wpt/streams/piping/error-propagation-forward.sharedworker-expected.txt
[ Mac-mac10.12 ] external/wpt/streams/piping/error-propagation-forward.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/mac-mac10.12/external/wpt/streams/piping/error-propagation-forward-expected.txt
[ Win ] external/wpt/streams/piping/error-propagation-forward.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/win/external/wpt/streams/piping/error-propagation-forward-expected.txt
[ Mac-mac10.12 ] external/wpt/streams/piping/error-propagation-forward.dedicatedworker.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/mac-mac10.12/external/wpt/streams/piping/error-propagation-forward.dedicatedworker-expected.txt
[ Win ] external/wpt/streams/piping/error-propagation-forward.dedicatedworker.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/win/external/wpt/streams/piping/error-propagation-forward.dedicatedworker-expected.txt
[ Mac-mac10.12 ] external/wpt/streams/piping/error-propagation-forward.serviceworker.https.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/mac-mac10.12/external/wpt/streams/piping/error-propagation-forward.serviceworker.https-expected.txt
[ Win ] external/wpt/streams/piping/error-propagation-forward.serviceworker.https.html new failing tests: https://crrev.com/c/940881/4/third_party/WebKit/LayoutTests/platform/win/external/wpt/streams/piping/error-propagation-forward.serviceworker.https-expected.txt

This import contains upstream changes from 9ff5d62fc664214b86ec8ef4b07aaa8097f7ebed to 8c4cf0026a8c041c8e9efb8d0f5553a2a0eff008:
Add test to check that StylePropertyMap sorts in increasing code-point order: https://github.com/w3c/web-platform-tests/commit/8c4cf0026a8c041c8e9efb8d0f5553a2a0eff008
[css-typed-om] Implement shorthands for .get/.getAll/.has.: https://github.com/w3c/web-platform-tests/commit/1d8bc90c101290f6c826467ca329220a210df1ad
Revert "webauthn: support the appid extension.": https://github.com/w3c/web-platform-tests/commit/3678c44dfe811f93a796285e9531ee34d7d15682
webauthn: support the appid extension.: https://github.com/w3c/web-platform-tests/commit/a200a0fb41dba43d82e3810e884a838ee835aa98
[css-typed-om] remove duplicate test.: https://github.com/w3c/web-platform-tests/commit/bdee13ee73cbb7036363462c456355e461d5262f
Make it possible to set RUN_JOB globally: https://github.com/w3c/web-platform-tests/commit/1305210bed8f4e3ef811998b219f220511d9a27d
Update CSS build system requirements: https://github.com/w3c/web-platform-tests/commit/11da4202dd2541e2dc2d36a4a3b2e265b4fcc6cc
Update w3ctestlib submodule: https://github.com/w3c/web-platform-tests/commit/6b044b942db61b0f91454f254b1b1847c2d36e29
Fix passing arguments to ./build-css-testsuites.sh: https://github.com/w3c/web-platform-tests/commit/fc544d570321a72c7418d45031db456db37c98be
Recommend `git submodule` instead of hg for w3ctestlib/apiclient: https://github.com/w3c/web-platform-tests/commit/5241f45421bb3455b6b3bc362fa63293eb58ce48
Fix paths when building CSS testsuite: https://github.com/w3c/web-platform-tests/commit/009fd7558acd69310568df2adf4292b9f10914af
Run script directly and don't source it: https://github.com/w3c/web-platform-tests/commit/e00868e2cc32b51bcc597400ef4ec1ca0fd5e4a7
Part 1: show(details) rejects tests (#9617): https://github.com/w3c/web-platform-tests/commit/1e107bb9fb80cf3180c7f1d136306b7f92c4ac53
Notifications: update IDL: https://github.com/w3c/web-platform-tests/commit/533b042ef84c97b1f1b0c2881cd5f1653c1ecb60
Make the data-url-shared.html test a bit prettier/simpler: https://github.com/w3c/web-platform-tests/commit/e28a4f29f2394547dfbcc82df5f96c5436edb837
Check if git is a batch file on Windows: https://github.com/w3c/web-platform-tests/commit/0503e45c79168576d5672532901a7df0545b05fd
Add a long timeout to acid 3 test, bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1439170 gecko-commit: 99f1ea44fc7915b8b7b33bce4732fa8765fd3ac2 gecko-integration-branch: autoland gecko-reviewers: gsnedders: https://github.com/w3c/web-platform-tests/commit/ca849f854d804134893b6c3e1a17d96eb7ff817f
ReadableStream piping: Add tests for shutting down when readable becomes errored with preventAbort = true (#9591): https://github.com/w3c/web-platform-tests/commit/5154532d4152e2cb8b75cbfbcf1c9e6bb4fe651c [affecting this directory]
tests show(detailsPromise) resolves as expected (#9663): https://github.com/w3c/web-platform-tests/commit/c4970cbd309c7fdafbb401ab4d0d67875247c1dd
[css-typed-om] Add more property tests.: https://github.com/w3c/web-platform-tests/commit/9659a35d816ff1b32835a2eccf3e0117dea4e5ce
HTMLMediaElement: set `muted_` when cloning element with muted attribute.: https://github.com/w3c/web-platform-tests/commit/82efd0226a261a41be569357efa2a65596f1fb75
Move more chrome webaudio layout tests to WPT: https://github.com/w3c/web-platform-tests/commit/1dd2953e47d12905513d7a295370c3e74bdc6948
[LayoutNG] Need to lay out legacy objects to figure out their inline size.: https://github.com/w3c/web-platform-tests/commit/c3e1a513c1d09c2b4544ad05ea3f03ba8483af27