All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=889166

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9504ce9f31799f37b813b68c5e4c7f9caa6fea26a0a90bc4afb62def0d7ecfb3


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

Android Nexus5 Perf
Android Nexus6 WebView Perf

blink_perf.svg - Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

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

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/16657f7b640000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/16657f7b640000

implement SkPixmap::erase() with draws by mtklein@google.com
https://skia.googlesource.com/skia/+/42f29f11817f9829b92dbf52d77f1447fbfc5ed0
1133 → 1148 (+14.76)

Make atomic lists list for bitmaps and paths by herb@google.com
https://skia.googlesource.com/skia/+/6c8d242b14355bf66c9137e9e4d6c7861d22168f
1152 → 1250 (+97.67)

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

Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

"implement SkPixmap::erase() with draws" has been in and out but is out now.
"Make atomic lists list for bitmaps and paths" is a bug fix.

I think this is WAI.