All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=780182

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3e46a7cd15383a68234de9b9d313ab2128ddea882eb7efa7793ebc3f57a760ce


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

chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964186649445661344

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

Hi eugenebut@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 : Eugene But
  Commit : be3da51753054798168076d71f9c77d4c74ec598
  Date   : Mon Oct 23 15:34:03 2017
  Subject: Use SameDocument term instead of InPage in ActiveTabTest.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : SimpleTextPathLineLayout/SimpleTextPathLineLayout
  Change       : 13.75% | 184625.742821 -> 159239.605265

Revision             Result                 N
chromium@510764      184626 +- 3445.52      6      good
chromium@510794      185229 +- 8657.89      9      good
chromium@510798      176306 +- 7030.5       6      good
chromium@510800      183378 +- 9218.12      6      good
chromium@510801      162737 +- 6456.04      6      bad       <--
chromium@510809      165662 +- 31344.2      9      bad
chromium@510824      159240 +- 3036.81      6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.layout

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964186649445661344


For feedback, file a bug with component Speed>Bisection

My CL changes comments and a test method name

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/12f60c07040000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14a2d38f040000

Kicking off a few more bisects to see if pinpoint can identify the cause.

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/14a2d38f040000

Looks like this is probably noise.