All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=805987

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f5f8e255b71d6d2d99f8e468df40ad90963f2574eed1c004045a6d21e10429a9


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

android-nexus5X

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/128964dc840000

📍 Couldn't reproduce a difference.
https://pinpoint.chromeperf.appspot.com/job/128964dc840000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14e91e3c440000

Last bisect actually hit a swarming timeout. Trying again on a wider range.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/17e205be440000

Trying another bisect.

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/17e205be440000

Use the actual Chrome OS AFDO profiles on Android by gbiv@chromium.org
https://chromium.googlesource.com/chromium/src/+/1f751e41506c1b1c875ca589681872f725b6d7ab

Move video_capture.mojom out of content. by xjz@chromium.org
https://chromium.googlesource.com/chromium/src/+/a4b93b7a062e8b03bdb1c0a605fe5dabc2bc50b0

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

My refactoring change is purely namespace change, which sounds unlikely related to this regression. 

gbiv@: Can you PTAL at the other change?

Looking at the longer-term graph, I see a substantial perf improvement when 2e17642e132375121818223a87d8eb02efbf4004, which was supposed to fix perf regressions like this, landed.

Kicked off a pinpoint job in  issue 822868  to verify that 2e17642e132375121818223a87d8eb02efbf4004 gets credit for that perf improvement. If so, we should be good here. :)

So, the pinpoint bots apparently don't like me. :)

Since we saw such a pronounced improvement (and correction from a new profile shortly after), I'm going to go with my original plan of assuming that the improvement was caused by 2e17642e132375121818223a87d8eb02efbf4004.