Note that this also affects smoothness.tough_webgl_ad_cases.reference

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9001332791199958352

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9001332741406943440

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9001324610221147088

===== BISECT JOB RESULTS =====
Status: completed


===== TESTED REVISIONS =====
Revision         Exit Code  Std Dev  N   Good?
chromium@418224  0          N/A      20  good
chromium@418514  0          N/A      20  bad

Bisect job ran on: android_nexus5_perf_bisect
Bug ID: 647364

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.scrolling_tough_ad_cases
Test Metric: jank_count/jank_count
Relative Change: 0.00%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus5_perf_bisect/builds/4128
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9001332741406943440


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5830219917688832

| 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 Tests>AutoBisect.  Thank you!

===== BISECT JOB RESULTS =====
Status: completed


===== TESTED REVISIONS =====
Revision         Exit Code  Std Dev  N  Good?
chromium@418805  0          N/A      1  good
chromium@418838  0          N/A      1  bad

Bisect job ran on: android_nexus5_perf_bisect
Bug ID: 647364

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.tough_webgl_ad_cases
Test Metric: frame_times/frame_times
Relative Change: 0.00%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus5_perf_bisect/builds/4131
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9001324610221147088


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5083174512623616

| 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 Tests>AutoBisect.  Thank you!

===== BISECT JOB RESULTS =====
Status: completed


=== Bisection aborted ===
The bisect was aborted because The metric values for the initial "good" and "bad" revisions do not represent a clear regression.
Please contact the the team (see below) if you believe this is in error.

=== Warnings ===
The following warnings were raised by the bisect job:

 * Bisect failed to reproduce the regression with enough confidence.

===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N   Good?
chromium@418224  10.1765  0.727607  17  good
chromium@418514  10.4     0.828079  15  bad

Bisect job ran on: android_nexus5_perf_bisect
Bug ID: 647364

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.scrolling_tough_ad_cases
Test Metric: jank_count/jank_count
Relative Change: 6.00%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus5_perf_bisect/builds/4127
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9001332791199958352


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5243728711647232

| 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 Tests>AutoBisect.  Thank you!