Hi Sahel@, I assigned this bug to you as you are the author of the test.
I am planning to submit a change to update the test expectation.
The test starts failing on build https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29/builds/11115.  Feel free to assign to the appropriate owner.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/644360630e6d94a5b92d6d011d82044b57fba17a

commit 644360630e6d94a5b92d6d011d82044b57fba17a
Author: kelvinp@chromium.org <kelvinp@chromium.org>
Date: Mon Sep 18 22:49:37 2017

Disable flaky WebKit layout test wheel-and-touch-scroll-use-count.html

Bug: 766357
Change-Id: I75db2dd95472dc79e5798ce0d34df42d64617d4f
Tbr: sahel@chromium.org
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/671654
Reviewed-by: Kelvin Poon <kelvinp@chromium.org>
Commit-Queue: Kelvin Poon <kelvinp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502704}
[modify] https://crrev.com/644360630e6d94a5b92d6d011d82044b57fba17a/third_party/WebKit/LayoutTests/TestExpectations

-Sheriff Chromium as the test expectation is updated. 

Not a p1 but we should probably have a look sometime soon.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ec80ce4196864c3ae2e0a901ffb239b5bb019edf

commit ec80ce4196864c3ae2e0a901ffb239b5bb019edf
Author: Sahel Sharify <sahel@chromium.org>
Date: Fri Oct 26 17:48:20 2018

rewrote wheel-and-touch-scroll-use-count.html to deflake it

Bug: 766357
Change-Id: Ibff868e5eabd019e02a3b7b225b26d78f1b9578a
Reviewed-on: https://chromium-review.googlesource.com/c/1299695
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#603138}
[modify] https://crrev.com/ec80ce4196864c3ae2e0a901ffb239b5bb019edf/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/ec80ce4196864c3ae2e0a901ffb239b5bb019edf/third_party/WebKit/LayoutTests/fast/scroll-behavior/wheel-and-touch-scroll-use-count.html

I will check flakiness dashboard in a few days to see if the test is stable or not.

 Issue 899549  has been merged into this issue.

Looks like it's still flaky, see: 899549

Flaky test: virtual/threaded/fast/scroll-behavior/wheel-and-touch-scroll-use-count.html
Sample failed build due to flakiness: https://ci.chromium.org/buildbot/chromium.linux/linux-xenial-rel/4513
Test output log: https://chromium-swarm.appspot.com/task?id=40d5317510101910
Culprit (77.6% confidence): r603138
Analysis: https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVy5AELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCKtAWNocm9taXVtLmxpbnV4L2xpbnV4LXhlbmlhbC1yZWwvNDUxMy93ZWJraXRfbGF5b3V0X3Rlc3RzIG9uIFVidW50dS0xNi4wNC9kbWx5ZEhWaGJDOTBhSEpsWVdSbFpDOW1ZWE4wTDNOamNtOXNiQzFpWldoaGRtbHZjaTkzYUdWbGJDMWhibVF0ZEc5MVkyZ3RjMk55YjJ4c0xYVnpaUzFqYjNWdWRDNW9kRzFzDAsSE01hc3RlckZsYWtlQW5hbHlzaXMYAQw

Please revert the culprit, or disable the test and find the appropriate owner.

If the culprit above is wrong, please file a bug using this link:
https://bugs.chromium.org/p/chromium/issues/entry?status=Unconfirmed&labels=Pri-1,Test-Findit-Wrong&components=Tools%3ETest%3EFindit%3EFlakiness&summary=%5BFindit%5D%20Flake%20Analyzer%20-%20Wrong%20result%20for%20virtual/threaded/fast/scroll-behavior/wheel-and-touch-scroll-use-count.html&comment=Link%20to%20Analysis%3A%20https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVy5AELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCKtAWNocm9taXVtLmxpbnV4L2xpbnV4LXhlbmlhbC1yZWwvNDUxMy93ZWJraXRfbGF5b3V0X3Rlc3RzIG9uIFVidW50dS0xNi4wNC9kbWx5ZEhWaGJDOTBhSEpsWVdSbFpDOW1ZWE4wTDNOamNtOXNiQzFpWldoaGRtbHZjaTkzYUdWbGJDMWhibVF0ZEc5MVkyZ3RjMk55YjJ4c0xYVnpaUzFqYjNWdWRDNW9kRzFzDAsSE01hc3RlckZsYWtlQW5hbHlzaXMYAQw

Automatically posted by the findit-for-me app (https://goo.gl/Ot9f7N).

The NextAction date has arrived: 2018-10-30

 Issue 899715  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/93358e14a416583647ba72cb30e571ffbd4ab658

commit 93358e14a416583647ba72cb30e571ffbd4ab658
Author: Andres Calderon Jaramillo <andrescj@chromium.org>
Date: Mon Nov 05 18:32:59 2018

blink: Disable flaky wheel-and-touch-scroll-use-count.html on Mac & Win.

This CL disables
virtual/threaded/fast/scroll-behavior/wheel-and-touch-scroll-use-count.html
on Mac and Windows due to its flakiness.

Bug: 766357
Change-Id: Ibcd8492031bc02c40ce9f72930960406ad1ced1c
Reviewed-on: https://chromium-review.googlesource.com/c/1312679
Reviewed-by: Dmitry Titov <dimich@chromium.org>
Commit-Queue: Andres Calderon Jaramillo <andrescj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605394}
[modify] https://crrev.com/93358e14a416583647ba72cb30e571ffbd4ab658/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b2165ad2914fa8072241300eab9469b0ffc92d44

commit b2165ad2914fa8072241300eab9469b0ffc92d44
Author: Andres Calderon Jaramillo <andrescj@chromium.org>
Date: Tue Nov 06 00:25:24 2018

blink: Enable wheel-and-touch-scroll-use-count.html on Linux.

This CL re-enables
virtual/threaded/fast/scroll-behavior/wheel-and-touch-scroll-use-count.html
on Linux since it doesn't seem to be flaking anymore.

Bug: 766357
Change-Id: I58be5caa2263282d167e12a6543520ee05ca9ebe
Reviewed-on: https://chromium-review.googlesource.com/c/1313575
Commit-Queue: Andres Calderon Jaramillo <andrescj@chromium.org>
Reviewed-by: Dmitry Titov <dimich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605534}
[modify] https://crrev.com/b2165ad2914fa8072241300eab9469b0ffc92d44/third_party/WebKit/LayoutTests/TestExpectations