GitLab

Tests:
symbols-function-invalid.html
system-additive-invalid.html
system-fixed-invalid.html
system-numeric-invalid.html
system-symbolic-invalid.htm

also flaky on Linux and Win

flakiness dashboard:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests&tests=external%2Fwpt%2Fcss%2Fvendor-imports%2Fmozilla%2Fmozilla-central-reftests%2Fcounter-styles-3%2Fsystem

No-Try: True
TBR: eirage@chromioum.org
Bug: 935689
Change-Id: Ib6724b44713a9a8cb7370adf781d948aa99615e2
Reviewed-on: https://chromium-review.googlesource.com/c/1495742
Commit-Queue: Ella Ge <eirage@chromium.org>
Reviewed-by: Ella Ge <eirage@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636573}