All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=610248

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg1MnpuAoM


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

chromium-rel-mac-hdd

=== Auto-CCing suspected CL author rdevlin.cronin@chromium.org ===

Hi rdevlin.cronin@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 : [Extensions] Update more bindings and allow for multiple feature access
Author  : rdevlin.cronin
Commit description:
  
Update more of the native handler bindings and allow for handler
functions that are called by multiple features.

BUG=591164

Review-Url: https://codereview.chromium.org/1945433002
Cr-Commit-Position: refs/heads/master@{#392182}
Commit  : 908ac08879c13a2c74573e88c0ca9d3f1f69eacd
Date    : Fri May 06 22:23:16 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@392163  112.682  2.0936   5  good
chromium@392175  110.784  1.89104  5  good
chromium@392181  110.2    3.20998  5  good
chromium@392182  94.677   1.14651  5  bad    <--
chromium@392183  93.9145  1.13603  5  bad
chromium@392184  92.7059  2.4884   5  bad
chromium@392186  94.0961  2.40078  5  bad

Bisect job ran on: mac_hdd_perf_bisect
Bug ID: 610248

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests blink_perf.bindings
Test Metric: node-list-access/node-list-access
Relative Change: 16.49%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_hdd_perf_bisect/builds/539
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9013151219877567440


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5296656321347584

| 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!

Certainly possible.  I'll revert and see if it goes back to normal.

FYI, reverted in revision c827ac207ee330c2fc1423f6796ee017166a524b.