[giow] (2) Make the case of an API call trying to navigate a browsing context that it can't navigate due to sandboxing throw a security exception rather than silently fail.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24110
Affected topics: DOM APIs, HTML

git-svn-id: http://svn.whatwg.org/webapps@8370 340c8d12-0b0e-0410-8428-c7bf67bfef74