[e] (0) Move the reference for URL origin from Web Origin to URL.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=26152
Affected topics: HTML, Security

git-svn-id: https://svn.whatwg.org/webapps@8787 340c8d12-0b0e-0410-8428-c7bf67bfef74