Chrome Version: <From about:version: Google Chrome 57, 56>
Chrome OS Version: <From about:version: Platform 56,56>
Chrome OS Platform: <Mac OS Sira>
<b>Network info: <network, encryption type, router model (if known)></b>

our webrtc video communication app freezes and unfreezes when we change the stream widget different streams. I did notice that the SSRC framesDecoded getStats value stops incrementing upwards during the freeze,This happens in chrome canary and beta, not happening in stable. 

Steps To Reproduce:
(1) Join our webrtc video streaming session. for example: meet.tokbox.com/google
(2) Join the session with 3-4 streams
(3)Double click streams randomly, wait for 2-3 seconds between layout change
(4) check webrtc internals, framesDecoded should be incrementing steadily

Expected Result:

nothing is frozen

Actual Result:

Streams get randomly freeze when you change the stream widget

How frequently does this problem reproduce? sometimes

What is the impact to the user, and is there a workaround? If so, what is
it?

There is no workaround at this point. This will impact our user experience with the app.

Please provide any additional information below. Attach a screen shot or
log if possible.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.