All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747580

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=a82b3ffcd9c344ed092467ff2826d1061984f6f9231af4b9835f1e8b2d1ec03a


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

android-nexus7v2

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973425160176330096

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

Suspected Commit
  Author : Hayato Ito
  Commit : b160073dd51148f56b6586a9902b8a24674886c4
  Date   : Wed Jul 19 04:33:31 2017
  Subject: Reland: Make /deep/ as no-op and remove ::shadow in dynamic profile

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : smoothness.gpu_rasterization.polymer
  Metric       : input_event_latency_discrepancy/http___www.polymer-project.org_components_paper-icon-button_demo.html
  Change       : 34.99% | 325.4507 -> 439.337733333

Revision             Result                  N
chromium@487676      325.451 +- 111.012      6      good
chromium@487721      300.2 +- 105.707        6      good
chromium@487743      307.729 +- 63.6596      6      good
chromium@487744      272.563 +- 70.5112      6      good
chromium@487745      417.229 +- 102.74       6      bad       <--
chromium@487746      406.699 +- 79.7752      6      bad
chromium@487749      424.386 +- 98.9955      6      bad
chromium@487755      420.611 +- 84.715       6      bad
chromium@487765      439.338 +- 73.318       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=http...www.polymer.project.org.components.paper.icon.button.demo.html smoothness.gpu_rasterization.polymer

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973425160176330096


For feedback, file a bug with component Speed>Bisection