All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=859074

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6e5b65f8b7c4082fb87c26c627b1290a333cfee0da82abe57f9ed01762221f82


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

chromium-webrtc-rel-mac

First regression:
https://chromium.googlesource.com/chromium/src/+log/7fec26a6fb6da97eade179e3fa8730fe2d5903ae%5E..02928bf08473f8db3bfd138ccea348ab10580f92?pretty=fuller&n=1000

Recovery:
https://chromium.googlesource.com/chromium/src/+log/2ae1a08f08c45eceddff21597ece01f1ab4d6ba6%5E..81fc4c5fd93b2b2ccd63bdc562593246d6c0dc1e?pretty=fuller&n=1000

Regression again:
https://chromium.googlesource.com/chromium/src/+log/bffc624914394e57d40cd71a9f1b30034b9c5914%5E..b8d4f4169b27b689b6552d73d33014698f7a6e5b?pretty=fuller&n=1000