WPT import https://crrev.com/c/1010516 introduced new failures in external/wpt/css/css-backgrounds:

List of new failures:
external/wpt/css/css-backgrounds/parsing/background-size-invalid.html new failing tests: https://crrev.com/c/1010516/3/third_party/WebKit/LayoutTests/external/wpt/css/css-backgrounds/parsing/background-size-invalid-expected.txt
external/wpt/css/css-backgrounds/parsing/border-image-valid.html new failing tests: https://crrev.com/c/1010516/3/third_party/WebKit/LayoutTests/external/wpt/css/css-backgrounds/parsing/border-image-valid-expected.txt
external/wpt/css/css-backgrounds/parsing/border-radius-valid.html new failing tests: https://crrev.com/c/1010516/3/third_party/WebKit/LayoutTests/external/wpt/css/css-backgrounds/parsing/border-radius-valid-expected.txt

This import contains upstream changes from 827efec49afed216d98738b9cc60f63ca2bfc401 to 7e8bc611993cc4546bd8aaf0fb4e7a3513a9e1a2:
Backed out changeset 0f81334efa0a (bug 1445883) for crashes (bug 1446902). a=backout (#10412): https://github.com/w3c/web-platform-tests/commit/7e8bc611993cc4546bd8aaf0fb4e7a3513a9e1a2
Fix regression allowing text value for -webkit-background-origin: https://github.com/w3c/web-platform-tests/commit/fc7af09fb3eea0ef511a061e5734c1dc8e539b0d
Merge pull request #10170 from ewilligers/backgrounds-borders-parsing: https://github.com/w3c/web-platform-tests/commit/56a257efe6f0603bb17eff06934074d37587d9ad
Update by testing Firefox nightly 61.01a: https://github.com/w3c/web-platform-tests/commit/940c743ef143aa60d71f4c3236c24572d53ecc5d [affecting this directory]
Rename cakey.pem to cacert.key for consistency: https://github.com/w3c/web-platform-tests/commit/a5bb6d23ac757fcb5e8aef6fd7ed7587324982db
Update marionette_driver from 2.5.0 to 2.6.0 (#10437): https://github.com/w3c/web-platform-tests/commit/0ac0ee7a22c2b8f6fd609a7986b104c75c5428bd
Return null from contentDocument/getSVGDocument() for cross-origin documents.: https://github.com/w3c/web-platform-tests/commit/e965af7f2ed188e8cd7c343d494b0d334e15c18d
[css-layout-api] Fix DCHECK with the custom layout and multicol.: https://github.com/w3c/web-platform-tests/commit/976e2c1f4b37821272f303aee639b62e1fd085f9 [affecting this directory]
followup: Remove a explicit testharness.css link to appease wptlint.  on a CLOSED TREE bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1339656 gecko-commit: e90ac14a383f2a3ae97358d68dfcfc47f68e60c2 gecko-integration-branch: central gecko-reviewers: me: https://github.com/w3c/web-platform-tests/commit/19a42b96905c8518ca6598867da87c7617af8095 [affecting this directory]
css-align] Upstream our shorthand serialization tests. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1339656 gecko-commit: 4ac4932953254018e6fbd110ab8ab5ca76885069 gecko-integration-branch: central gecko-reviewers: mats: https://github.com/w3c/web-platform-tests/commit/13758ad1f5a49ebd90689951fb86618ed5f58cc3 [affecting this directory]
css-align] Don't restrict shorthand parsing now that's not ambiguous. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1339656 gecko-commit: 91ae8e15b175edc6e6e74b99f68fc155438b20ef gecko-integration-branch: central gecko-reviewers: mats: https://github.com/w3c/web-platform-tests/commit/b3a9b56e6a0a3c7d6efa6a1dee2e55444269d209 [affecting this directory]
S13nSW: Update wpt/service-workers/service-worker/navigation-preload/broken-chunked-encoding.https.html: https://github.com/w3c/web-platform-tests/commit/1dcdb61cb2eb054e6d16733d4eb4a6b56793b598
[css-typed-om] Support remaining multi-col properties.: https://github.com/w3c/web-platform-tests/commit/0060eb41b1da8a5989772e12c034e14e8d025fae [affecting this directory]
Add tests for liveness of NodeLists/HTMLCollections (#8993): https://github.com/w3c/web-platform-tests/commit/2d4fbd417e6772267c7755004e1022801fd3b92e
Stop generating stylo expectations. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1452113 gecko-commit: ea3453cc7d92df2539adeb45f390b9dfece2c4e6 gecko-integration-branch: central gecko-reviewers: jgraham: https://github.com/w3c/web-platform-tests/commit/7bbb8d0cc0cb5adad07deb1c2aa76a047f8921b7
Add test for checking property order after setting property on CSSStyleDeclaration: https://github.com/w3c/web-platform-tests/commit/c5c79bb418341bb0b2ed304f1325cd522bf4306e [affecting this directory]
Add webdriver.Element string representation. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1453084 gecko-commit: bdb78cb3d6d3cd0a5ebc31ee91a3c2590f54bb17 gecko-integration-branch: central gecko-reviewers: whimboo: https://github.com/w3c/web-platform-tests/commit/6003ea3102498b94445a4253d5da98d6a24a13ae
Add webdriver.Session string representation. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1453084 gecko-commit: 097b57bbeb46b0f3abc2b6fcec1c41a42d87f5da gecko-integration-branch: central gecko-reviewers: whimboo: https://github.com/w3c/web-platform-tests/commit/7f139952827f507a469d263d3917770a18fa7395
Stop running tests on pypy (#10435): https://github.com/w3c/web-platform-tests/commit/5a0d559e1acb9856b784e0d02e34856d9d8fad90
Don't store logger on the Config object (#10430): https://github.com/w3c/web-platform-tests/commit/03d76cc0bf283aead5520fd4137a7fc7607ee917
accname: Updated tests (#10433): https://github.com/w3c/web-platform-tests/commit/4cf7a66b04de7869777091b118892aac79659f6f
s/host/browser_host/ in wdspec fixture: https://github.com/w3c/web-platform-tests/commit/4b3342e16f320b69fef3c1809bb2614dc2109590
Add support for serializing the config as a dictionary.: https://github.com/w3c/web-platform-tests/commit/ddcc729bca5abcc460db875952eb693b04fe2e41
Part 9: Fix wpt reftest shape-image-025.html to make every frame of the animated GIF use a green box in the lower-left quadrant.: https://github.com/w3c/web-platform-tests/commit/a31d306732d898c13184a5dbefaa582e214047e8 [affecting this directory]
Part 8: Fix wpt reftest shape-image-001.html to correct a too-wide container.: https://github.com/w3c/web-platform-tests/commit/6b2fe34df13d646cab0a4b35dc33ee0202301851 [affecting this directory]
Part 5: Add web-platform-tests for linear-gradient with writing-modes.: https://github.com/w3c/web-platform-tests/commit/ccd2afabdea9e5325028220262f67a11383e5005 [affecting this directory]
Part 4: Replace hash '#' with %23 in SVG data URIs, to fix XML parse errors.: https://github.com/w3c/web-platform-tests/commit/1cda980346fcd679353c2a1d74c5f1f98d030ce3 [affecting this directory]
Use unicode-segmentation to iterate graphemes instead of chars (#10220): https://github.com/w3c/web-platform-tests/commit/9bc2e7439192ae1247de7421d23c60281037c037
Add a WPT test to verify dedicated workers have a separate client ID from their owning document. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1451124 gecko-commit: aed7d4d9be32f8806138d2a23f4b8b0332498085 gecko-integration-branch: central gecko-reviewers: asuth: https://github.com/w3c/web-platform-tests/commit/6571e31adb61b5c42f8dcf612e467958c9561650
Improve error when unable to find SSL key or cert. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1321517 gecko-commit: c7abc1d5b6ec9d32f54745f51e96065a89b774bf gecko-integration-branch: central gecko-reviewers: ato: https://github.com/w3c/web-platform-tests/commit/6e61ed2f67de550d0b04c22d6b6178a41b84fa01
Check for FTP subresource after applying CSP. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1404744 gecko-commit: b2c0699b9bd405300986bc26f256e8bb9c0c53a7 gecko-integration-branch: central gecko-reviewers: ckerschb: https://github.com/w3c/web-platform-tests/commit/002991d123354e1495ba66a4b6f04a0e6f19da9f
Change more web-platform tests to avoid using FTP.  CLOSED TREE bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1404744 gecko-commit: 42cda784d2c54c8730e7fd218a00fb5846263e76 gecko-integration-branch: central gecko-reviewers: me: https://github.com/w3c/web-platform-tests/commit/3ed3aadd4dc48c259493ec9f916faaee921f6ef3
Simple sub-resource only test. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1404744 gecko-commit: 1035ca43655e0bc157804943c21729d4a27823cd gecko-integration-branch: central gecko-reviewers: ckerschb: https://github.com/w3c/web-platform-tests/commit/6d1dd02664a8965e0086f994b9a476c9e7b4b62f
Disable test_pause_dblclick bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1432105 gecko-commit: f424114c6a2ccb65c256f42a835377eeb0f92d5c gecko-integration-branch: central gecko-reviewers: whimboo: https://github.com/w3c/web-platform-tests/commit/9b7e9bae73b6b2ed4515935937a72c783d779059
Stop pointer action tests from restarting Firefox bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1432105 gecko-commit: f6b8d9c6cbfa3b4a1b0437cee337ff636b3cfcbe gecko-integration-branch: central gecko-reviewers: whimboo: https://github.com/w3c/web-platform-tests/commit/cf39c87ae4712892c3da1238e672dba932996ae5
Merge pull request #10415 from w3c/font-variant-descriptor: https://github.com/w3c/web-platform-tests/commit/7967c43d852345c8750e06f165fb0ba6ff27adf3
[css-typed-om] Support remaining inline properties.: https://github.com/w3c/web-platform-tests/commit/9a2ba239ec826c0007352368d44fcfc02804ff16 [affecting this directory]
Add tests for transferring ImageBitmap objects.: https://github.com/w3c/web-platform-tests/commit/5d9948bbae3cb9517460f444350c13cc3d3a1888
quick test to see if descriptor supported anywhere: https://github.com/w3c/web-platform-tests/commit/98cc5c8bb77ef18be9c4464c8e66873654ade128 [affecting this directory]
Don't reparse stylesheets when assigning empty string to empty element.: https://github.com/w3c/web-platform-tests/commit/17b721557fe68928f16187318b80098f1a1b125a [affecting this directory]
update rel help (#10188): https://github.com/w3c/web-platform-tests/commit/991a413a0058a50288bbc508c00319e209c5ba02 [affecting this directory]
Add python handler directory to Python path in wptserve (#10397): https://github.com/w3c/web-platform-tests/commit/b3b6ea0b307a2a47cb19d1e843c7344769c410d9
[css-typed-om] Support remaining svg properties.: https://github.com/w3c/web-platform-tests/commit/d44cd21c00741101f22d62772efc070ba59e8f04 [affecting this directory]
[css-typed-om] Support remaining mask properties.: https://github.com/w3c/web-platform-tests/commit/e6f6bbfafe3dd4d35f01e5467911d0f4cbf7e618 [affecting this directory]
[css-typed-om] Support remaining text properties.: https://github.com/w3c/web-platform-tests/commit/3b7b8db90148105a987cc367165f7551edd8519f [affecting this directory]
[css-typed-om] Add support for scroll properties.: https://github.com/w3c/web-platform-tests/commit/387fba3809b776a98e6b11725c6d9a5be037bbca [affecting this directory]
Make DOMTokenList.supports() case-insensitive: https://github.com/w3c/web-platform-tests/commit/2e8fa7ba82e6d796bf460567be21fbe3d4902568
[KeyboardLock] Updating API to reject the first promise if lock is called twice: https://github.com/w3c/web-platform-tests/commit/1bb2bd025c3729192ded265adfbd57079ada2c5e
Automate more focus tests with testdriver (#10396): https://github.com/w3c/web-platform-tests/commit/6934f152ea12746ab33950caf6926ef8d99a5097
Firefox serialition: https://github.com/w3c/web-platform-tests/commit/fd10426a47d917110bc6f04995f01559ae817f05 [affecting this directory]
update rel help: https://github.com/w3c/web-platform-tests/commit/601982949bd7c58e9b19e60c41943fba08a45766 [affecting this directory]
CSS Backgrounds and Borders 3 parsing tests: https://github.com/w3c/web-platform-tests/commit/67918e50c7f9aae6c81060ae466a47b8482d6beb [affecting this directory]