All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=787769

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=a3160ae356ace6de01de6582d4f030ab6976ea5c14073d49bd74a9988e756b49


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

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962230138743493888

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

Suspected Commit
  Author : Ian Kilpatrick
  Commit : 98b46470f307a68c8183d628237d7b361af96244
  Date   : Tue Nov 21 01:22:24 2017
  Subject: Add secure_context_mode_ to CSSParserContext.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : SimpleTextPathLineLayout/SimpleTextPathLineLayout
  Change       : 31.91% | 9918.22586728 -> 6753.56870891

Revision             Result                  N
chromium@517977      9918.23 +- 102.753      6      good
chromium@518004      10025.0 +- 238.195      6      good
chromium@518011      10077.7 +- 107.768      6      good
chromium@518014      10118.0 +- 133.051      6      good
chromium@518015      10089.9 +- 196.06       6      good
chromium@518016      6706.36 +- 79.7605      6      bad       <--
chromium@518017      6690.4 +- 76.7998       6      bad
chromium@518030      6753.57 +- 80.0768      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=android-webview --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/8962230138743493888


For feedback, file a bug with component Speed>Bisection