Version: 53.0.2773.0 / 8481.0.0 dev and 
Devices: Big, Blaze and Kitty

What steps will reproduce the problem?
1) Join a two way successful hangout call between chrome device Blaze user and desktop(Linux)
2. From chrome device, select the screenshare option from the left side of the hangout window
3. A new window with the different screens shows up for the selection

Expected result:
All available windows should be listed in the screensharing window and any selected window should be shared with desktop user

Actual result:
"Internal display" window is displayed in the list of available options for screensharing but shows blank screen sometimes for few seconds. Selecting "Internal display" window for screensharing is working as expected.

Feedback submitted for this issue:
https://feedback.corp.google.com/product/208/neutron?lView=rd&lRSort=1&lROrder=2&lRFilter=1&lReportSearch=user:srcv&lReport=10155179570

Notes:
1) This issue is also seen on other Nyan family devices Blaze and Kitty 
2) This issue is soemtimes seen when screensharing is done for the first time and soemtimes after screensharing for few times.
3)WebRTC internal dumps from devices Big, Blaze and Kitty during hangout with Linux desktop user:
https://pantheon.corp.google.com/storage/browser/chromiumos-test-logs/bugfiles/cr/612198/Bug_verification_logs/
4) Reference bug : https://bugs.chromium.org/p/chromium/issues/detail?id=612198