iFrames not working?

[GoogleCodeExporter]

What steps will reproduce the problem?
1. jsFiddle link: http://jsfiddle.net/BcuLq/2/
2. SO link: 
http://stackoverflow.com/questions/20573632/pagedown-not-working-with-iframes

What is the expected output? What do you see instead?
I'm just trying to get youtube / vimeo iframes to work with pagedown.  Even if 
I trim it down to src="https://www.google.com", I can't get the frame 
displaying locally or in the fiddle.  

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

Please provide any additional information below.

Original issue reported on code.google.com by flatout2...@gmail.com on 13 Dec 2013 at 6:40