[] (3) Move the spec from a stack of incumbent scripts to a stack of script settings object. This should in theory have no concrete effects (though I may have changed some of the origin used for Web Workers started from document.domain-affected scripts that were called from other scripts with different original origins).
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=22863
Affected topics: Canvas, DOM APIs, HTML, HTML Syntax and Parsing, Security, Workers

git-svn-id: http://svn.whatwg.org/webapps@8262 340c8d12-0b0e-0410-8428-c7bf67bfef74