All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=762240

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=a652639ce05734a7900eda9d86171586dd56f4a2dc87127530a7fcb6ba1b6173


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969253501431424848

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

Suspected Commit
  Author : chaopeng
  Commit : 840d165b6ac02f10342147c556e67c776e1dd3da
  Date   : Tue Aug 29 19:19:03 2017
  Subject: Call ScrollBegin/End in LTI behind latching flag

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : smoothness.sync_scroll.key_mobile_sites_smooth
  Metric       : frame_times/https___www.google.co.uk_search?hl_en_q_barack+obama_cad_h
  Change       : 126.06% | 37.2194971893 -> 84.137262565

Revision             Result                  N
chromium@498016      37.2195 +- 5.7614       6      good
chromium@498133      35.9062 +- 1.81794      6      good
chromium@498191      35.6506 +- 2.71497      6      good
chromium@498192      86.4767 +- 26.5563      6      bad       <--
chromium@498193      80.2847 +- 42.4714      6      bad
chromium@498195      95.2174 +- 53.1478      6      bad
chromium@498199      81.172 +- 30.1945       6      bad
chromium@498206      85.6518 +- 38.9818      6      bad
chromium@498220      81.9068 +- 24.6115      6      bad
chromium@498249      84.1373 +- 53.459       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=https...www.google.co.uk.search.hl.en.q.barack.obama.cad.h smoothness.sync_scroll.key_mobile_sites_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969253501431424848


For feedback, file a bug with component Speed>Bisection