Here is a JS Fiddle (https://jsfiddle.net/j8ppcwp1/1/) that just has the SVG that shows the proper behavior.

Because this agrees with firefox, I suspect this is just how it works.

I have to admit I'm not sure what the bug is though. Is it possible to make a jsbin/jsfiddle version that shows the incorrect behavior?

Ember-twiddle does not work in IE or Safari. But when I locally use that example in IE and Safari, it works fine. As I said, it also worked fine in Chrome up until a few days/weeks ago when I was on 48. In 49 it doesn't work.

I'll see if I can drum up a jsfiddle that doesn't work. 

Maybe we could try a bisect to see if we'll be any the wiser.

Oh, I see srcdoc...

https://jsfiddle.net/j8ppcwp1/2/ seems to repro the problem.

Ref  issue 473547  (https://bugs.chromium.org/p/chromium/issues/detail?id=473547#c6)

If I use the ember code by itself, not in ember-twiddle, as far as I know there is no srcdoc yet I still have the problem.

Bisect info:
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/38b2f1369ee256717e05cc2f9c8ccbb449e6bdf2..6967287223ccbe29db1454e6ace0d412524aac25

suspecting https://chromium.googlesource.com/chromium/src/+/d97f56157c1d119d3a0dda5d5d341e099f7f2b26
shanmuga.m@, Could you please check the above issue & help us in finding an owner it its not yours.

Good Build: 49.0.2566.0
Bad Build: 49.0.2567.0

able to reproduce the issue on Win7, Mac OS X 10.11.3, Ubuntu 14.04 using Chrome Dev #51.0.2687.0, Canary 51.0.2692.0, Beta #50.0.2661.49 and in stable #49.0.2623.110 using https://jsfiddle.net/j8ppcwp1/2/ 

@nyerramilli,
 Thank you for notifying me!! I will take care of this issue..

@shanmuga.m: I don't think there's any need to rush here - if the "not in ember-twiddle" case turns out to be the same as the "in ember-twiddle" case, then this is a dupe of the bug mentioned above ( issue 473547 ), or possibly  issue 470608 . A issue very similar to the former was recently brought up in the CSS WG, so we should wait and see what that ends up with and then implement it.

@fs,
 Thank you for the update. 
Anyway I have just made a patch to fix this issue. (not fixing 473547)
https://codereview.chromium.org/1842643003/

I did some more testing on my specific issue. In my actual application, removing the <base> tag fixes the problem. Ember uses the <base> tag. So I guess this is a duplicate of 470608. That said, it sounds like there was another issue related to the srcdoc that was found in the process.

The issue with iframe @srcdoc is the same - in that case the base URL is the one of document that hosts the iframe. Duping to  issue 470608  sounds reasonable.