All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=613170

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjK-gtQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjKa5sAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjP3UtAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjL27uAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjKGFqwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjL2tqQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjIXLvAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjOa1owkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjKyvrQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgjPmZvwkM


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

android-galaxy-s5
android-nexus6
android-nexus9
chromium-rel-mac-hdd

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

Hi yukishiino@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 : bindings: Supports [SameObject] extended attribute.
Author  : yukishiino
Commit description:
  
Syntactically we've supported [SameObject] extended attribute,
but we've not had any implementation for it.

This CL stores the first returned value in the holder's
private value, and returns it for the second time.

BUG= 462913 

Review-Url: https://codereview.chromium.org/1980553002
Cr-Commit-Position: refs/heads/master@{#393827}
Commit  : 40d19a73c02f0185e5a49c4761860762896dec28
Date    : Mon May 16 13:47:14 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@393820  1117.95  3.19255  5  good
chromium@393824  1146.39  6.2047   5  good
chromium@393826  1141.93  10.7605  5  good
chromium@393827  900.863  2.10832  5  bad    <--
chromium@393828  902.323  2.00099  5  bad

Bisect job ran on: android_nexus6_perf_bisect
Bug ID: 613170

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests blink_perf.css
Test Metric: CSSPropertyUpdateValue/CSSPropertyUpdateValue
Relative Change: 19.29%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2192
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9012223915827382800


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6369192786264064

| 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!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4

commit fdd68c2f872ba56475500d80dcf02b1aeb97cbc4
Author: yukishiino <yukishiino@chromium.org>
Date: Fri May 20 13:34:11 2016

Revert of bindings: Supports [SameObject] extended attribute. (patchset #2 id:20001 of https://codereview.chromium.org/1980553002/ )

Reason for revert:
This CL hits terrible performance regressions.

Original issue's description:
> bindings: Supports [SameObject] extended attribute.
>
> Syntactically we've supported [SameObject] extended attribute,
> but we've not had any implementation for it.
>
> This CL stores the first returned value in the holder's
> private value, and returns it for the second time.
>
> BUG= 462913 
>
> Committed: https://crrev.com/40d19a73c02f0185e5a49c4761860762896dec28
> Cr-Commit-Position: refs/heads/master@{#393827}

TBR=bashi@chromium.org,haraken@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= 462913 ,  613172 ,  613170 

Review-Url: https://codereview.chromium.org/2000643002
Cr-Commit-Position: refs/heads/master@{#395064}

[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/LayoutTests/fast/dom/gc-9-expected.txt
[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/Source/bindings/scripts/v8_attributes.py
[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/Source/bindings/templates/attributes.cpp
[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/Source/core/css/CSSImportRule.cpp
[modify] https://crrev.com/fdd68c2f872ba56475500d80dcf02b1aeb97cbc4/third_party/WebKit/Source/core/css/CSSImportRule.idl