All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747031

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=1ee117655f896cccb83c647246ceb8699ae7d742ac1da6070ae775f905504e08


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

android-one

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973531090972918176

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

Hi ssid@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 : Siddhartha
  Commit : 79fb9f2dadacc419da6ca36c2760a1aaae8fc415
  Date   : Tue Jul 18 18:48:41 2017
  Subject: Add a delay to clear GL context when app is backgrounded

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : thread_times.key_idle_power_cases
  Metric       : tasks_per_second_total_all/css-animation.html
  Change       : 553.47% | 5.30923175331 -> 34.6944755772

Revision             Result                   N
chromium@486073      5.30923 +- 0.691735      6      good
chromium@486875      5.49263 +- 0.647344      6      good
chromium@487276      5.28427 +- 0.968922      6      good
chromium@487476      5.29268 +- 1.16999       5      good
chromium@487526      8.47994 +- 16.7119       6      good
chromium@487533      5.39342 +- 0.880091      6      good
chromium@487536      5.3016 +- 0.820752       6      good
chromium@487538      5.98442 +- 3.76191       6      good
chromium@487539      34.1427 +- 5.45388       6      bad       <--
chromium@487551      33.5861 +- 4.79252       5      bad
chromium@487576      33.2028 +- 5.71904       8      bad
chromium@487676      34.6945 +- 2.91823       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=css.animation.html thread_times.key_idle_power_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973531090972918176


For feedback, file a bug with component Speed>Bisection

Perf sheriff ping: this is still waiting on the blocked bug?

Perf sheriff ping again. ssid, are you still working on this?

Eric landed a fix for this case, and found some workaround later for this I believe.
https://chromium.googlesource.com/chromium/src/+/f9e460609c08e26f7107e4897e5f1ed85f2a42f3