[whatwg] AllowSeamless

[Adam Barth]

Hi whatwg,

I've added a proposal to the wiki
<http://wiki.whatwg.org/wiki/AllowSeamless> about letting a document
indicate that it is willing to be displayed seamlessly with a
cross-origin parent.  This proposal is a refinement of the approach
previously discussed in this thread:
<http://old.nabble.com/crossorigin-property-on-iframe-td33677754.html>.

Let me know if you have any feedback.

Thanks!
Adam