All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=765585

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=55acb8754b4eb26486336f6ede2378f1e69ce1f97415d4a6e23c47242f0933ec


Bot(s) for this bug's original alert(s):

chromium-webrtc-rel-win10

The change is only visible for Win10. All other platforms, including Win7 and Win8 have unchanged behavior.

Does the "improvement" here mean good or bad? And the change is to audio jitter?

My Cl should only affect the case that during window sharing, the shared window is minimized. Yes it can save some CPU cycles, but I don't think it can affect the overall performance, especially to audio part. Also I doubt the browser_tests can do window sharing and minimize the window during testing.

Is it possible to nail down the specific test in browser_tests?

Jitter is bad in general, so in this case the change is for the better.

Since this is a very limited change (in absolute numbers), and only for one bot, I'd say we close this. Feel free to re-open if you disagree.