All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=911121

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e2618a8640964dbce0fc4cbe2514182a4cfe68c4a546f25391211353ba704dbd


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

Android Nexus5 Perf
Android Nexus5X WebView Perf
Android Nexus6 WebView Perf

rasterize_and_record_micro.top_25 - Benchmark documentation link:
  None

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/118edf42140000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/118edf42140000

Recognize --proxy-bypass-list from WebView. by eroman@chromium.org
https://chromium.googlesource.com/chromium/src/+/4bc3f6d6ec942c97293e303f469ccdc4bf551fc2
record_time: 0.0113 → 1.131 (+1.119)

<b>Convert <audio> pipeline to use async device info requests.</b> by dalecurtis@chromium.org
https://chromium.googlesource.com/chromium/src/+/41607b54686f80bc672c294161ca0da1cf49f89f
record_time: 1.132 → 1.155 (+0.0236)

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

Benchmark documentation link:
  None

If this is only WebView, I would expect it is a dupe of  Issue 906540 .

My change has nothing to do with this, so taking eroman@'s advice as a dupe.