All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=856838

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b360cb143df6d96a8316cb3fdc0c1ca5367333271bad392f5ab5bdbac72793a9


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

health-plan-webview-low-end-phone
health-plan-webview-phone

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8942614968044962672

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Steve Kobes
  Commit : 807c7cf898178b44c11866b69cf350da47f41b76
  Date   : Sat Jun 23 22:39:38 2018
  Subject: Remove ScrollableArea::IsScrollable and IsProgrammaticallyScrollable.

Bisect Details
  Configuration: webview-phone-perf-bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_os:system_memory:native_heap:proportional_resident_size_avg/load_media/load_media_youtube
  Change       : 2.98% | 24027325.3333 -> 24742930.6667

Revision                                       Result                  N
android-chrome@6305b6474c                      24027325 +- 252519      6      good
android-chrome@e841561f09                      24162835 +- 325268      6      good
android-chrome@e841561f09,chromium@569891      24131091 +- 265119      6      good
android-chrome@e841561f09,chromium@569894      24091667 +- 146424      6      good
android-chrome@e841561f09,chromium@569895      24229395 +- 308934      6      good
android-chrome@e841561f09,chromium@569896      24913256 +- 299288      6      bad       <--
android-chrome@e841561f09,chromium@569897      24707432 +- 182163      6      bad
android-chrome@e841561f09,chromium@569902      24679101 +- 107227      6      bad
android-chrome@33d8f0dcc2                      24742931 +- 110236      6      bad

Please refer to the following doc on diagnosing memory regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.media.youtube system_health.memory_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8942614968044962672


For feedback, file a bug with component Speed>Bisection