All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=699705

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglKLj5wkM


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8985656333331831296

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8985656313879163552

=== Auto-CCing suspected CL author pdr@chromium.org ===

Hi pdr@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : pdr
  Commit : a20ad732333dc9db2b545886acd16a11abdc5842
  Date   : Tue Mar 07 17:11:15 2017
  Subject: Remove indirection: setup scrollbar scroll layers in the scrollbar constructor

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : smoothness.sync_scroll.key_mobile_sites_smooth
  Metric       : first_gesture_scroll_update_latency/http___mlb.com_
  Change       : 76.94% | 11.6092857143 -> 19.6928571429

Revision             Result                  N
chromium@455089      11.6093 +- 2.67259      14      good
chromium@455101      12.602 +- 4.33947       14      good
chromium@455104      11.37 +- 1.27654        9       good
chromium@455105      22.0138 +- 11.076       6       bad       <--
chromium@455106      19.9673 +- 17.2486      9       bad
chromium@455107      29.5067 +- 16.7942      6       bad
chromium@455113      21.3167 +- 14.8627      9       bad
chromium@455136      19.9255 +- 34.6235      21      bad
chromium@455183      19.6929 +- 20.3684      14      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=http...mlb.com. smoothness.sync_scroll.key_mobile_sites_smooth

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985656333331831296

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5057214110236672


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : smoothness.sync_scroll.key_mobile_sites_smooth
  Metric       : first_gesture_scroll_update_latency/http___mlb.com_
  Change       : 23.48% | 15.4671428571 -> 19.0989047619

Suspected Commit Range
  2 commits in range
  https://chromium.googlesource.com/chromium/src/+log/2e97347bcd54763ed7e4b3a692537bd8304975d7..a11672fb4c998040224d7dc97e5bdc05d46a4145


Revision             Result                  N
chromium@455052      15.4671 +- 77.9166      21       good
chromium@455085      11.7953 +- 2.42126      9        good
chromium@455102      11.7099 +- 2.38706      9        good
chromium@455104      11.4595 +- 2.21775      14       good
chromium@455105      ---                     ---      build failure
chromium@455106      22.1994 +- 37.4896      14       bad
chromium@455110      24.375 +- 2.80111       6        bad
chromium@455118      21.9024 +- 21.0112      14       bad
chromium@455183      19.0989 +- 35.7864      21       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=http...mlb.com. smoothness.sync_scroll.key_mobile_sites_smooth

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985656313879163552

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4975051520081920


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

These were temporary progressions and have returned to baseline.