Bug 1382102 - Update mochitest expectation. r=emilio

MozReview-Commit-ID: FCLxWKZ5Qap

--HG--
extra : rebase_source : c9624c7cb9ad9b3edafe4882bb6703b8809041b1

layout/style/test/mochitest.ini

@@ -275,7 +275,6 @@ skip-if = toolkit == 'android' # bug 1328522
 [test_selectors.html]
 skip-if = toolkit == 'android' #bug 775227
 [test_selectors_on_anonymous_content.html]
-fail-if = stylo # bug 1382102
 [test_setPropertyWithNull.html]
 [test_shorthand_property_getters.html]
 [test_specified_value_serialization.html]