Possible way to display the reverting CL:
1. Add a sentence after Findit result:
findit Findit (?) found culprit 0510799 with 100% confidence. More details...  Reverting CL (url) has been created, PLEASE CHECK.

2. Add a header under tree close:
Tree is closed ...
Findit created a reverting CL(url) for the culprit (rev) of this tree close. PLEASE CHECK(or CONFIRM).

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/8de90094826b34437113a6356efce9273432e691

commit 8de90094826b34437113a6356efce9273432e691
Author: Chan <chanli@chromium.org>
Date: Wed Mar 15 18:16:45 2017

[Findit] Add reverting CL url to the response of Findit API.

BUG= 700636 

Change-Id: Ieeeee7f73d398a0111c312a1f7110e552ad62f50
Reviewed-on: https://chromium-review.googlesource.com/453885
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Reviewed-by: Jeffrey Li <lijeffrey@chromium.org>
Commit-Queue: Chan Li <chanli@chromium.org>

[modify] https://crrev.com/8de90094826b34437113a6356efce9273432e691/appengine/findit/test/findit_api_test.py
[modify] https://crrev.com/8de90094826b34437113a6356efce9273432e691/appengine/findit/findit_api.py

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/04db64bcabbe707ae5b26586955de440db41899b

commit 04db64bcabbe707ae5b26586955de440db41899b
Author: Chan <chanli@chromium.org>
Date: Wed Mar 15 23:44:38 2017

[SoM-Findit] Add reverting CL to Findit results on Sheriff-o-Matic.

After Findit gets the url to the reverting CL of a culprit, it will send this info to Sheriff-o-Matic.

Currently only add a sentence after Findit result as "Reverting CL (url) has been created. PLEASE CHECK."

Design doc: https://docs.google.com/a/google.com/document/d/1_nrlNP8kIKvl5XgoBX0k8TOwNypkK-xmZ89C0UdqEv0/edit?usp=sharing

BUG= 700636 

Change-Id: I554491e7bc27e499ca09bdf1f2075c4cf4a401d2
Reviewed-on: https://chromium-review.googlesource.com/453985
Reviewed-by: Sean McCullough <seanmccullough@chromium.org>
Commit-Queue: Chan Li <chanli@chromium.org>

[modify] https://crrev.com/04db64bcabbe707ae5b26586955de440db41899b/go/src/infra/appengine/sheriff-o-matic/elements/som-extension-build-failure/som-extension-build-failure.js
[modify] https://crrev.com/04db64bcabbe707ae5b26586955de440db41899b/go/src/infra/monitoring/messages/findit.go
[modify] https://crrev.com/04db64bcabbe707ae5b26586955de440db41899b/go/src/infra/appengine/sheriff-o-matic/elements/som-extension-build-failure/som-extension-build-failure.html
[modify] https://crrev.com/04db64bcabbe707ae5b26586955de440db41899b/go/src/infra/monitoring/analyzer/analyzer_test.go