All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=693476

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDguP7q7goM


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8987419787395724128

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

Hi yzshen@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 : yzshen
  Commit : 2859a2ac06ab5d9df6706cc45525dc4a2085051c
  Date   : Tue Feb 14 22:24:25 2017
  Subject: Mojo C++ bindings: Simplify associated interface API.

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : storage.indexeddb_endure
  Metric       : vm_private_dirty_final_browser/vm_private_dirty_final_browser
  Change       : 1.94% | 25284.9090909 -> 25774.9090909

Revision             Result                  N
chromium@450437      25284.9 +- 134.353      6      good
chromium@450484      25319.9 +- 305.058      6      good
chromium@450490      25282.8 +- 322.32       6      good
chromium@450493      25363.0 +- 174.977      6      good
chromium@450494      25851.1 +- 52.6601      6      bad       <--
chromium@450495      25841.6 +- 113.714      6      bad
chromium@450496      25778.2 +- 285.175      6      bad
chromium@450508      25865.8 +- 219.329      6      bad
chromium@450531      25774.9 +- 362.969      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 storage.indexeddb_endure

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8987419787395724128

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4961172140326912


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36

commit 9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36
Author: yzshen <yzshen@chromium.org>
Date: Fri Feb 17 23:07:50 2017

Mojo C++ bindings: change some std::unique_ptr<base::Lock> to base::Optional<base::Lock>.

This helps to reduce heap allocation.

BUG= 651103 , 693476 

Review-Url: https://codereview.chromium.org/2707483002
Cr-Commit-Position: refs/heads/master@{#451394}

[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/connector.h
[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/lib/connector.cc
[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/lib/may_auto_lock.h
[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/lib/multiplex_router.cc
[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/lib/multiplex_router.h
[modify] https://crrev.com/9ac6e6466cc0df7e1a3ad4488c5c8bdc2db4da36/mojo/public/cpp/bindings/lib/scoped_interface_endpoint_handle.cc

I think the memory usage has dropped to its original level.