Specifically, it's virtual that's failing:

virtual/mouseevent_fractional/fast/events/touch/gesture/gesture-tap-mouse-events-between-frames.html

dtapuska@ can you take a look or re-triage if you're the wrong person? (Saw you among other Blink>Input bugs)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c42aba3d4e3bef0210a63071c26858701441970f

commit c42aba3d4e3bef0210a63071c26858701441970f
Author: Henrik Boström <hbos@chromium.org>
Date: Wed Nov 29 10:55:06 2017

Marked gesture-tap-mouse-events-between-frames.html as flaky

TBR=dtapuska@chromium.org

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  789485 
Change-Id: Ibb79e0e1142c43686a99a9460fd3bc02798cc104
Reviewed-on: https://chromium-review.googlesource.com/795954
Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Henrik Boström <hbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520069}
[modify] https://crrev.com/c42aba3d4e3bef0210a63071c26858701441970f/third_party/WebKit/LayoutTests/TestExpectations

+cc myid.shin@chromium.org for touching this file 2½ years ago :)

With this marked as flaky, removing from sheriff queue.

Also flaky on Windows.

https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win10/builds/28133

Unexpected Failures:
* virtual/scroll_customization/fast/events/touch/gesture/gesture-tap-mouse-events-between-frames.html

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/43eb440cc28079966e8ee031e0dcce77770f6375

commit 43eb440cc28079966e8ee031e0dcce77770f6375
Author: henrika <henrika@chromium.org>
Date: Thu Nov 30 09:42:53 2017

Marks gesture-tap-mouse-events-between-frames.html as flaky

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  789485 
Change-Id: I5f2acf85a076c258bea16d507df442dae057f032
Reviewed-on: https://chromium-review.googlesource.com/798291
Reviewed-by: Henrik Andreasson <henrika@chromium.org>
Commit-Queue: Henrik Andreasson <henrika@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520491}
[modify] https://crrev.com/43eb440cc28079966e8ee031e0dcce77770f6375/third_party/WebKit/LayoutTests/TestExpectations

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c7444646ebbd11e5e16ec481dfaae53d4bd15d65

commit c7444646ebbd11e5e16ec481dfaae53d4bd15d65
Author: Dave Tapuska <dtapuska@chromium.org>
Date: Thu Nov 30 17:54:45 2017

Add spacer to gesture-tap-mouse-events-between-frames test.

The fake mouse move event gets fired for mojo input messages and
causes the layout test to be flaky. Ensure we have a spacer so that the
hover events that the fake mouse move generate are contained in there.

BUG= 789485 

Change-Id: I3a6d659e9f51906536333f78fa32cf40e4ad99c6
Reviewed-on: https://chromium-review.googlesource.com/797850
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520596}
[modify] https://crrev.com/c7444646ebbd11e5e16ec481dfaae53d4bd15d65/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/c7444646ebbd11e5e16ec481dfaae53d4bd15d65/third_party/WebKit/LayoutTests/fast/events/touch/gesture/gesture-tap-mouse-events-between-frames.html