Bug 1367523 Part 3: Re-enable layout/style/test/test_stylesheet_clone_font_face.html. r=heycam

MozReview-Commit-ID: J7oWXP7KnHx

--HG--
extra : rebase_source : d7394696669cf88d0c812b847edac2649aeebc33

layout/style/test/mochitest.ini

@@ -270,7 +270,6 @@ skip-if = toolkit == 'android' #bug 775227
 [test_style_attribute_standards.html]
 [test_style_struct_copy_constructors.html]
 [test_stylesheet_clone_font_face.html]
-skip-if = stylo # bug 1367523
 [test_stylesheet_additions.html]
 skip-if = !stylo
 [test_supports_rules.html]