Sandboxed iframes should not be granted notification permission of the parent frame unless allow-same-origin is specified
https://bugs.webkit.org/show_bug.cgi?id=36732

Reviewed by Adam Barth.

The behavior was fixed in wkbug.com/79704, but there aren't currently
any tests ensuring that it doesn't regress for sandboxed frames. This
patch adds one.

* fast/notifications/notifications-sandbox-permission-expected.txt: Added.
* fast/notifications/notifications-sandbox-permission.html: Added.
* fast/notifications/resources/notifications-iframe.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138624 268f45cc-cd09-0410-ab3c-d52691b4dbfc