All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=883757

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=cb620481780701ab5c36c0dce31e18302d794475908244ecf7d1619002af34a6


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

Android Nexus5 Perf
Android Nexus5X WebView Perf

system_health.memory_mobile - Benchmark documentation link:
  https://bit.ly/system-health-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/178ee54b640000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/178ee54b640000

Surface Synchronization: Enable by default on Android by ericrk@chromium.org
https://chromium.googlesource.com/chromium/src/+/5479bee2ba20c0527e19137d8056b539d30125d1
4.804e+07 → No values

Disable Surface Synchronization on Webview by nednguyen@google.com
https://chromium.googlesource.com/chromium/src/+/a91df97e284e497ecf1222b4ada5af66306718a5
No values → 5.058e+07

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

Benchmark documentation link:
  https://bit.ly/system-health-benchmarks

 Issue 883781  has been merged into this issue.

The CL was necessary to get the Android webview bot working again