[giow] (3) Try to define order for supported property names. This is not based on testing. If there are compatibility constraints here that prevent implementing this as specced, please let me know.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=20395
Affected topics: DOM APIs, HTML, Microdata, Workers

git-svn-id: http://svn.whatwg.org/webapps@7722 340c8d12-0b0e-0410-8428-c7bf67bfef74