All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=735936

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgjvG7rAsM


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

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8976083351628184208

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8976083344690744160

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

Hi eae@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 : eae
  Commit : 3a9ec9418cd17a5ae1d8db43d5eb7369ad0358ca
  Date   : Mon Jun 19 17:30:42 2017
  Subject: Break LayoutObject dependency for ImageQualityController

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : paint-offset-changes/paint-offset-changes
  Change       : 11.10% | 2244.8721 -> 2493.95541667

Revision             Result                  N
chromium@480464      2244.87 +- 13.5774      5      good
chromium@480477      2218.16 +- 22.9957      6      good
chromium@480480      2234.31 +- 28.532       6      good
chromium@480482      2242.23 +- 22.4609      6      good
chromium@480483      2613.04 +- 48.3175      6      bad       <--
chromium@480489      2590.0 +- 96.902        6      bad
chromium@480513      2530.23 +- 20.488       6      bad
chromium@480561      2493.96 +- 50.333       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 blink_perf.paint

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976083351628184208

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4517380060872704


| 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!

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : eae
  Commit : 3a9ec9418cd17a5ae1d8db43d5eb7369ad0358ca
  Date   : Mon Jun 19 17:30:42 2017
  Subject: Break LayoutObject dependency for ImageQualityController

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : paint-offset-changes/paint-offset-changes
  Change       : 9.76% | 2257.8425 -> 2478.13975

Revision             Result                  N
chromium@480464      2257.84 +- 21.1395      6      good
chromium@480477      2226.84 +- 32.8605      6      good
chromium@480480      2225.49 +- 19.2871      6      good
chromium@480482      2223.26 +- 21.2051      6      good
chromium@480483      2609.2 +- 33.0076       6      bad       <--
chromium@480489      2573.38 +- 29.8544      6      bad
chromium@480513      2526.67 +- 36.2259      6      bad
chromium@480561      2478.14 +- 44.1044      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 blink_perf.paint

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976083344690744160

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5623698272288768


| 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!

Explictly assigning. A CL you landed tripped one of the speed metrics we measure in the lab. If this is the first time this has happened to one of your CLs, or if it's been a while, please read: https://chromium.googlesource.com/chromium/src/+/master/docs/speed/addressing_performance_regressions.md

We're looking for one of the following:
1. Justification via explanation
2. Plan to revert or fix
3. Angry rage throwing of equipment at my head

Just be aware that I'm trained in trumpet playing and First Aid and am not afraid to use it.

Note: This was a bulk edit message and not very personal.

ImageQualityController has since been disabled by removed. The code in question is no longer being executed.