selectors4/dir-style-* still fail without LayoutNG.

Fixed for LayoutNG here:
https://chromium-review.googlesource.com/c/chromium/src/+/2460849

TBR=myid.shin@igalia.com

Bug: 576815
Change-Id: Icedf156de44fad5c61e8ce519246221c414b7782
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2596260Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#838026}

third_party/blink/web_tests/FlagExpectations/disable-layout-ng

@@ -390,6 +390,10 @@ crbug.com/591099 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftest
 crbug.com/591099 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/ib-split/remove-from-split-inline-6.html [ Failure ]
 crbug.com/591099 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/ib-split/split-inner-inline-2.html [ Failure ]
 
+### external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/selectors4/
+crbug.com/576815 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/selectors4/dir-style-01a.html [ Failure ]
+crbug.com/576815 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/selectors4/dir-style-01b.html [ Failure ]
+
 ### external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/sizing/
 crbug.com/591099 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/sizing/block-size-with-min-or-max-content-1a.html [ Failure ]
 crbug.com/591099 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/sizing/block-size-with-min-or-max-content-1b.html [ Failure ]