All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=911565

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9a9407d028ad814db4d4a11ba5be02c002ab7cf00c2404cd2392e7463c7fcd3d


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

Win 7 Perf

blink_perf.shadow_dom - Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/16902290140000

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/16902290140000

All of the runs failed. The most common error (20/20 runs) was:
SwarmingTestError: The test failed. No Python exception was found in the log.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/1493ea85940000

Requesting another pinpoint run.

📍 Found significant differences after each of 13 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1493ea85940000

Roll src/third_party/chromite ffec6a8edd68..7dbd8f071016 (1 commits) by chromium-autoroll@skia-public.iam.gserviceaccount.com
https://chromium.googlesource.com/chromium/src/+/ee4acb9528457f3dca9100f36b8e6981f436fe12
v1-small-deep-distribution: No values → No values

[Regression] Invalidate compositing inputs when changing background alpha. by chrishtr@chromium.org
https://chromium.googlesource.com/chromium/src/+/ce731513c7fc60ee8953f98add4fe9a1e4e19563
v1-small-deep-distribution: No values → 12.63

Updating XTBs based on .GRDs from branch master by govind@chromium.org
https://chromium.googlesource.com/chromium/src/+/30c82c22fbe26eb2631bb16310e19dd67599b6bf
v1-small-deep-distribution: 12.62 → No values

IndexedDB: Use ArrayDataView to convert IDBKey binary to std::string by cmp@chromium.org
https://chromium.googlesource.com/chromium/src/+/c07c4f39ed016e7b30d1e707486acd4985eb9c7a
v1-small-deep-distribution: No values → 12.8

Remove unused PATCH from chrome_cleaner VERSION file by joenotcharles@google.com
https://chromium.googlesource.com/chromium/src/+/b52b13f9d83f5338fd332973b319e9d81f17a0a4
v1-small-deep-distribution: 12.97 → No values

Enable BrowserKeyEventsTest.ReservedAccelerators on Linux. by estade@chromium.org
https://chromium.googlesource.com/chromium/src/+/5061842a6bca5ab8665433be106aa4c696a0fcff
v1-small-deep-distribution: No values → 12.9

Handle RGB video correctly. by hubbe@google.com
https://chromium.googlesource.com/chromium/src/+/feeeabcd597dd1201294fca43f5e98ddca79fa04
v1-small-deep-distribution: 12.88 → 13.51 (+0.6265)

[LayoutNG] Reduces the size of NGPhysical{Box|Text}Fragment by kojii@chromium.org
https://chromium.googlesource.com/chromium/src/+/58605429dc978099c398d0d183017e9543a26425
v1-small-deep-distribution: 13.53 → 13.06 (-0.473)

Re-plumb backdrop-filter through blink-gen-property-trees by masonfreed@chromium.org
https://chromium.googlesource.com/chromium/src/+/91e518cb31819aba7ea704d09303fb3a80265c4e
v1-small-deep-distribution: 12.96 → 12.34 (-0.619)

[dict] Add helper methods to SmallorderedNameDictionary by gsathya@chromium.org
https://chromium.googlesource.com/v8/v8/+/4f586850a9ad9840de5584e92ff6366673d9a975
v1-small-deep-distribution: 12.55 → No values

Update V8 to version 7.2.307. by v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com
https://chromium.googlesource.com/chromium/src/+/48d7325a85cae5e7f8e0b8ad3b983fee0b8c308f
v1-small-deep-distribution: No values → 11.96

[CI] Refactor CullRect preparing for SPv2 interest rect implementation by wangxianzhu@chromium.org
https://chromium.googlesource.com/chromium/src/+/407a0120872d6788b25190f12bb2d2fe429fc250
v1-small-deep-distribution: 11.75 → 10.96 (-0.79)

[FCP++] Enable FCP++ metrics via finch experiment by maxlg@chromium.org
https://chromium.googlesource.com/chromium/src/+/4e243fc4a328acee8354c73e7c9df2facac9f3f7
v1-small-deep-distribution: 11.2 → 14.59 (+3.394)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

Based on the pinpoint result, the regression is caused by FCP++.