All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=742471

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bd35559e56479965c9580680c6bb6ec8dc50735689b5257b9015858b41f08319


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974158368616419152

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

Hi sunnyps@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 : Sunny Sachanandani
  Commit : 7a4f2242badc95b109bb551e2ec1ebcebc2ff0d2
  Date   : Wed Jul 12 02:27:18 2017
  Subject: cc: Add crash key for debugging BeginMainFrame renderer hang.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : thread_times.key_mobile_sites_smooth
  Metric       : thread_renderer_compositor_cpu_time_per_frame/thread_renderer_compositor_cpu_time_per_frame
  Change       : 8.77% | 2.45918606043 -> 2.67490875792

Revision             Result                    N
chromium@485733      2.45919 +- 0.0667958      6      good
chromium@485771      2.48715 +- 0.0530182      6      good
chromium@485790      2.48026 +- 0.0264558      6      good
chromium@485799      2.48472 +- 0.0302735      6      good
chromium@485801      2.47875 +- 0.0249353      6      good
chromium@485802      2.67526 +- 0.0545441      6      bad       <--
chromium@485804      2.67284 +- 0.0472649      6      bad
chromium@485808      2.67491 +- 0.059886       6      bad

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 thread_times.key_mobile_sites_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974158368616419152


For feedback, file a bug with component Speed>Bisection

The crash key is temporary for debugging a renderer hang. I'll revert this before the branch so that we don't see the regression on dev channel.

 Issue 744686  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a1efdc3eec28f62fab81f4d9f6c224302675a7d5

commit a1efdc3eec28f62fab81f4d9f6c224302675a7d5
Author: Sunny Sachanandani <sunnyps@chromium.org>
Date: Thu Jul 20 00:18:59 2017

cc: Remove crash logging for BeginMainFrame hang.

This regressed some benchmarks and also accounts for a few percent of
power consumption.

Revert "cc: Add crash key for debugging BeginMainFrame renderer hang."

This reverts commit 7a4f2242badc95b109bb551e2ec1ebcebc2ff0d2.

Revert "cc: Dump more state in begin main frame hang crash key."

This reverts commit 057d5553e4524a7726b2e7d5ecfef85289379000.

TBR=brianderson,rsesek,alokp,scottmg,brucedawson
BUG=622080, 744740 , 742471 

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ib96e7ca083c4ce3a22890b8d6e822f57dd391ef7
Reviewed-on: https://chromium-review.googlesource.com/578066
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488060}
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/android_webview/common/crash_reporter/crash_keys.cc
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/cc/scheduler/scheduler.cc
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/cc/scheduler/scheduler.h
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/cc/scheduler/scheduler_state_machine.cc
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/cc/scheduler/scheduler_state_machine.h
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/chrome/app/chrome_crash_reporter_client_win.cc
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/chrome/common/crash_keys.cc
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/chrome/common/crash_keys.h
[modify] https://crrev.com/a1efdc3eec28f62fab81f4d9f6c224302675a7d5/chromecast/crash/cast_crash_keys.cc