[fullscreen] Make ::backdrop { display: block } not important (#25)

Context: https://codereview.chromium.org/1372413004/

CC @upsuper @rocallahan @esprehn

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fullscreen/issues/25

Received on Thursday, 1 October 2015 09:38:31 UTC