svg/animations/svglengthlist-animation-3.html is occasionally failing on Mac ports.
Marked flakey in https://trac.webkit.org/r154716
Flakiness in this test was fixed with following in Blink - https://chromium.googlesource.com/chromium/blink/+/20185aa12b6b9501ec650c219e133738f9654bd9
I am trying to remove this test in favor of WPT here: https://github.com/WebKit/WebKit/pull/22281 WPT variant passes and don't have any platform specific expectation. Once landed, I will mark this as 'RESOLVED CONFIGURATION CHANGED'. Refer to 'See Also'.