Test for crbug.com/274059. Compare rules from a style in a shadow tree with ::content in a different shadow tree.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS window.getComputedStyle(getNodeInComposedTree("hostChild")).color is "rgb(0, 128, 0)"
PASS successfullyParsed is true

TEST COMPLETE