This test ensures that content inside a seamless srcdoc iframe correctly inherits style, even if it doesn't set any styles of its own.
PASS window.getComputedStyle(srcdocspan).getPropertyCSSValue('color').cssText is "rgb(255, 0, 0)"
PASS window.getComputedStyle(srcdocstylespan).getPropertyCSSValue('color').cssText is "rgb(255, 0, 0)"
PASS window.getComputedStyle(span).getPropertyCSSValue('color').cssText is "rgb(255, 0, 0)"