All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=599574

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg8KvmqgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiJCQqQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiN7YogoM


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

chromium-webrtc-trunk-tot-rel-mac

CL range:
http://test-results.appspot.com/revision_range?start=383920&end=383932

I don't see any WebRTC related CLs in that range, and the only audio related change I can find is https://codereview.chromium.org/1817093003, but that seems related to ARC efforts, not WebRTC.

tlegrand@ - can you take a look or find someone else on the audio side who can?

I think I know what this is, that machine was upgraded from 10.9 to 10.10 at March 30, which fits with the regression. I'll leave it to tlegrand@ to close the bug though (in case there may be something else to look at).

This seems safe to close based on that the machine was upgraded.