The following tests are failing: * http/wpt/css/css-highlight-api/highlight-text-replace.html * http/wpt/css/css-highlight-api/highlight-text.html There's a 1 pixel difference between actual and expected output in the firs test, while 2 pixels difference in the second test. Possibly related to https://bugs.webkit.org/show_bug.cgi?id=205529.