All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=887944

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=7f697dcfc538205f545f7dd14bd3fabc83b59d3c716b5b3e6315251c183be3eb


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

Android Nexus5 Perf
Android Nexus6 WebView Perf

speedometer - Benchmark documentation link:
  None

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/13fd90c7640000

📍 Found significant differences after each of 4 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/13fd90c7640000

Reland "Roll clang 340925:342523." by thakis@chromium.org
https://chromium.googlesource.com/chromium/src/+/bbb140b822e8ae819be4fae81c2c7e713a7a5e8e
2.393e+04 → 2.552e+04 (+1595)

[Autofill Assistant] Add parameter precondition. by szermatt@chromium.org
https://chromium.googlesource.com/chromium/src/+/89bf26b0bfeed017535cc7e33bf53e497c96bac1
2.55e+04 → 2.58e+04 (+297.2)

Reimplement imperative shadowdom API for supporting slot change event by kymuto@google.com
https://chromium.googlesource.com/chromium/src/+/03c1a559253973aba98f15200f4ed08366c7c80d
2.58e+04 → 2.6e+04 (+191.3)

Fix [D]CHECK failure in local sync by mastiz@chromium.org
https://chromium.googlesource.com/chromium/src/+/7b89a95b9060b8ca219154e563e6c55d002b05da
2.608e+04 → 2.578e+04 (-291.8)

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

Benchmark documentation link:
  None