Test that deferred parsing doesn't parse the :hover rule until the hover happens.

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


PASS internals.deferredStyleRulesCount(document.styleSheets[0]) is 1
PASS internals.deferredStyleRulesCount(document.styleSheets[0]) is 0
PASS successfullyParsed is true

TEST COMPLETE