[giow] (1) Updates for r8297, fixing <option> to treat 'dirtiness' correctly, and r8336, fixing 'error' events sent to MessagePort objects to not race messages sent from those ports (or, worse, the event that the port is delivered on...).
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24057
Affected topics: DOM APIs, HTML

git-svn-id: http://svn.whatwg.org/webapps@8341 340c8d12-0b0e-0410-8428-c7bf67bfef74