Re: [csswg-drafts] [selectors-4] "effective media volume is mutable" pseudo-class for media elements (#3933)

For context, see the discussion on #3821 starting with @tabatkins' [comment](https://github.com/w3c/csswg-drafts/issues/3821#issuecomment-487171357).

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Received on Tuesday, 14 May 2019 17:44:02 UTC