[giow] (3) Update <frame> requirements to match legacy better
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=23952
Affected topics: HTML, Rendering

git-svn-id: http://svn.whatwg.org/webapps@8380 340c8d12-0b0e-0410-8428-c7bf67bfef74