Frameset doctype causing IE10 breakage

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Load any of the browserscope test pages (ringmark, rich text)

What is the expected output? What do you see instead?

The rich text page doesn't run at all, ringmark and security do run. With dev 
tools open, the rich text page doesn't become totally unresponsive, but 
flickers like crazy & shows an "unrecognized doctype" error in the dev tools 
console.

What version of the product are you using? On what operating system?

IE 10 on Windows RT 8

Please provide any additional information below.

Replacing the funky frameset doctypes with the html5 doctype should fix this. 
OTOH, maybe this is intended to throw IE into compatibility/quirks mode?

Original issue reported on code.google.com by ja...@jaredhirsch.com on 4 Oct 2013 at 1:43

[GoogleCodeExporter]

This is certainly unfortunate. I imagine this would actually be alot of work - 
the frameset doctype is why those pages work in frames I believe - if you 
changed them to HTML5 they may not work the same.

It's not designed to throw IE in to quirks I don't believe. At least I know 
that's not true for tests other than RichText. 

Original comment by els...@google.com on 13 Oct 2013 at 6:42