All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784208

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=88c1a01571571f3cb54abbf8cee4af0b5d0a901c1d87ef5d28afdd88c1b9e520


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

chromium-rel-win10
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963093457469141072

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : media.desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:malloc:effective_size_avg/video.html?src_tulip2.ogg_type_audio
  Change       : 0.22% | 12600913.8571 -> 12628332.1429

Suspected Commit Range
  2 commits in range
  https://chromium.googlesource.com/chromium/src/+log/326e85635c1df7f3519bd05c4629b4644de88060..7a126bae68421d24a2c5c673cdb9c0826739085e


Revision             Result                   N
chromium@515171      12600914 +- 131870       14       good
chromium@515188      12590574 +- 67103.7      14       good
chromium@515193      12597420 +- 109180       21       good
chromium@515194      ---                      ---      build failure
chromium@515195      12625259 +- 134746       14       bad
chromium@515197      12622138 +- 110756       14       bad
chromium@515212      12629959 +- 93450.5      14       bad
chromium@515245      12628332 +- 82205.1      14       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=video.html.src.tulip2.ogg.type.audio media.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963093457469141072


For feedback, file a bug with component Speed>Bisection

It's either https://chromium.googlesource.com/chromium/src/+/7a126bae68421d24a2c5c673cdb9c0826739085e by reveman@ or https://chromium.googlesource.com/chromium/src/+/768cf73afc5361a1203c422f98cf18b41dedff0c by jbudorick@. The regression isn't huge though.

My change only affects Chrome OS when running Android apps.

John, FYI. Please take a look in case this is unexpected.

that CL of mine is a clean revert of a CL that landed the day before.

Thanks John.