[cssom] location should be a URL #9316
Description
It seems to me that https://drafts.csswg.org/cssom-1/#concept-css-style-sheet-location should be a URL and serialized when returned to script.
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It seems to me that https://drafts.csswg.org/cssom-1/#concept-css-style-sheet-location should be a URL and serialized when returned to script.