[registered-property-cssom.html]
[CSS.registerProperty]
expected: FAIL
[Formerly valid values are still readable from inline styles but are computed as the unset value]
expected: FAIL
[Values can be removed from inline styles]
expected: FAIL
[Stylesheets can be modified by CSSOM]
expected: FAIL
[Valid values can be set on inline styles]
expected: FAIL
[CSSOM setters function as expected for unregistered properties]
expected:
if os == "linux": [PASS, FAIL]