All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=708925

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgvNiF7QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3LP7owoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3LWbvwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3KmQugoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3PH9pgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3InaoQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3PyUqAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3OfGqgoM


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

webrtc-android-tests-nexus5-kitkat

This is the commit in question:
https://chromium.googlesource.com/external/webrtc/+/4eeb53748a47157077c37f69c4aed79feb931b61

My checkin was limited to iOS only. Perf alert is for Android. =

Indeed. So it must be some coincidence. There's no relevant commit near yours too.