All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=633190

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg-vb6rgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghrGvugoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghtPjtQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg-vfysAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghrvUpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgxq3asQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgxprdrQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgpqq3sAkM


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

android-nexus5
android-nexus5X
android-nexus6
android-one

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005529349710586768

===== BISECT JOB RESULTS =====
Status: completed


=== Bisection aborted ===
The bisect was aborted because The metric values for the initial "good" and "bad" revisions do not represent a clear regression.
Please contact the the team (see below) if you believe this is in error.

=== Warnings ===
The following warnings were raised by the bisect job:

 * Bisect failed to reproduce the regression with enough confidence.

===== TESTED REVISIONS =====
Revision         Mean      Std Dev  N  Good?
chromium@407762  86450688  7974331  8  good
chromium@407769  91931136  1436785  8  bad

Bisect job ran on: android_nexus6_perf_bisect
Bug ID: 633190

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_mobile
Test Metric: browse_social-memory:chrome:all_processes:reported_by_os:system_memory:ashmem:private_dirty_size_avg/browse_social_facebook
Relative Change: 10.17%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2393
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005529349710586768


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5277978888503296

| 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 Tests>AutoBisect.  Thank you!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005161633080280512

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9004246905863155360

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

Hi ulan@chromium.org, the bisect results pointed to your CL below as possibly
causing a regression. Please have a look at this info and see whether
your CL be related.


===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : [system-health] Fix mobile facebook story for Nexus7v2.
Author  : ulan
Commit description:
  
Facebook fetches items on demand while scrolling. Before this patch
Nexus7v2 was timing out while waiting for items because the scroll
distance was not enough to trigger fetching of items.

This patch increases the scroll distance and updates WPR.

*** NOTE TO SHERRIF ***
Regressions are expected in browse:social:facebook story.

BUG= 631022 

Review-Url: https://codereview.chromium.org/2175383003
Cr-Commit-Position: refs/heads/master@{#407756}
Commit  : aa939aefe4a8f0c33705ed006bcab8bf13134820
Date    : Tue Jul 26 10:08:46 2016


===== TESTED REVISIONS =====
Revision         Mean       Std Dev   N  Good?
chromium@407747  174263376  29423694  5  good
chromium@407753  189115472  5213363   5  good
chromium@407755  187503286  2279444   5  good
chromium@407756  234619574  17890616  5  bad    <--
chromium@407759  241631107  9867977   5  bad
chromium@407769  230490704  19055329  8  bad

Bisect job ran on: android_nexus5X_perf_bisect
Bug ID: 633190

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_mobile
Test Metric: browse_social-memory:chrome:all_processes:reported_by_os:system_memory:private_dirty_size_avg/browse_social_facebook
Relative Change: 31.41%
Score: 99.0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus5X_perf_bisect/builds/516
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9004246905863155360


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5829733892227072

| 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 Tests>AutoBisect.  Thank you!

My cl changes the benchmark.