All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=787767

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c498b580faf61d8597ae1eb397f84f0833267c6b73861461da626e062c52f999


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

android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962230284153937552

=== 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.paint
  Metric       : color-changes/color-changes
  Change       : 13.20% | 464.300666667 -> 525.5765

Revision             Result                  N
chromium@517977      464.301 +- 7.34478      6      good
chromium@518004      468.544 +- 6.25394      6      good
chromium@518011      467.069 +- 8.47119      6      good
chromium@518014      469.947 +- 10.0961      6      good
chromium@518015      471.771 +- 2.58556      6      good
chromium@518016      519.872 +- 14.32        6      bad       <--
chromium@518017      526.111 +- 9.54805      6      bad
chromium@518030      525.577 +- 9.55009      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.paint

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962230284153937552


For feedback, file a bug with component Speed>Bisection