[giow] (3) WebSocket.url should be consistent with how the URL is used in the first place.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=23821
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8305 340c8d12-0b0e-0410-8428-c7bf67bfef74