All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=922526

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=26379b06755c7b7d2bbe5baf7aedfaab4ccc5f94ef77a08cf983723ad6ccf357


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

Android Nexus5X WebView Perf
Android Nexus6 WebView Perf

rendering.mobile - Benchmark documentation link:
  https://bit.ly/rendering-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/161371e0540000

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/161371e0540000

All of the runs failed. The most common error (20/20 runs) was:
ReadValueError: Could not find values matching: {'story': u'infinite_scrolling', 'histogram': u'thread_total_all_cpu_time_per_frame'}

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14b9202c540000

📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/14b9202c540000

Enable ImplicitRootScroller by bokan@chromium.org
https://chromium.googlesource.com/chromium/src/+/5173a50d9c7bac6890ee3070a49a437c43275e00
thread_total_all_cpu_time_per_frame: 24.05 → 26.13 (+2.086)

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

Benchmark documentation link:
  https://bit.ly/rendering-benchmarks