[giow] (3) Make the automatic pausing when you take a <video> out of a Document happen regardless of whether it's still loading or not.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24350
Affected topics: Video and Audio

git-svn-id: http://svn.whatwg.org/webapps@8447 340c8d12-0b0e-0410-8428-c7bf67bfef74