+CONSOLE WARNING: HTML element <link> is ignored in shadow tree.
PASS computedBackgroundColor(spanInShadow) is "rgba(0, 0, 0, 0)"
PASS computedBackgroundColor(spanInHostChildren) is "rgba(0, 0, 0, 0)"
PASS computedBackgroundColor(spanOutsideOfShadow) is "rgba(0, 0, 0, 0)"