[] (0) Updating <img>/<picture> section with upstream changes
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8707 340c8d12-0b0e-0410-8428-c7bf67bfef74
[giow] (2) <iframe>s only do their nested browsing context stuff when they are themselves in a browsing context
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=25880
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8708 340c8d12-0b0e-0410-8428-c7bf67bfef74
[e] (0) Try to avoid negative-length strings and strings with EOF characters in them...
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=25871
Affected topics: HTML Syntax and Parsing

git-svn-id: http://svn.whatwg.org/webapps@8709 340c8d12-0b0e-0410-8428-c7bf67bfef74
Merge remote branch 'origin/master' into whatwg