Sammi: can you look into this or help triaging?

Looks like the renderer process is crashing in most (all?) tests:

../../headless/test/headless_browser_test.cc(266): error: Failed

Abnormal renderer termination

Stack trace:

Backtrace:

	StackTraceGetter::CurrentStackTrace [0x00007FF6A84F29F0+80]
	testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x00007FF6A8509E3A+90]
	testing::internal::AssertHelper::operator= [0x00007FF6A850991A+90]
	headless::HeadlessAsyncDevTooledBrowserTest::RenderProcessExited [0x00007FF6A7F9F8C0+192]
	headless::HeadlessWebContentsImpl::RenderProcessExited [0x00007FFC8900633E+414]
	content::RenderProcessHostImpl::ProcessDied [0x00007FFC7D649474+1236]
	content::RenderProcessHostImpl::OnChannelError [0x00007FFC7D64B2F3+179]
	IPC::ChannelProxy::Context::OnDispatchError [0x00007FFC92A3C47D+45]

The log doesn't appear to contain the crash reason :\ However the latest runs on the bots are green now.

ping? Tests are still flaky: https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win10%20Tests%20x64%20%28dbg%29/4550

Still flaky as of today. The rate of flakiness is quite high:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=headless_browsertests&tests=Headless

Could someone please take a look?

(With all the experimental tests failing every single run on this bot, additional flakies like these distract a lot from other severe problems)

Merge this into bug 876224?

I am not sure why this still shows up on SoM even after the sheriff label is gone.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7e42384992ccc9874365ba5f28ae389d527d1401

commit 7e42384992ccc9874365ba5f28ae389d527d1401
Author: Andrey Kosyakov <caseq@chromium.org>
Date: Sat Dec 15 02:50:23 2018

Fix a race in headless virtual time & compositor tests

A lack of explicit start time for frame caused real time clock to
be used for frame start, which may cause next frame to be dropped
if its (virtual) timestamp is earlier.

Bug:  909043 ,  843734 
Change-Id: I4a909be2e1e4f69f0834a87ffdb3d402c450adfc
Reviewed-on: https://chromium-review.googlesource.com/c/1379181
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616925}
[modify] https://crrev.com/7e42384992ccc9874365ba5f28ae389d527d1401/headless/test/data/protocol/emulation/compositor-image-animation-test.js
[modify] https://crrev.com/7e42384992ccc9874365ba5f28ae389d527d1401/headless/test/data/protocol/helpers/virtual-time-controller.js