Chrome Version: 57.0.2987.146 (This has been happening on older versions as well, I estimate it started 1-2 months ago. I recently upgraded, to no improvement)
Chrome OS Version: 9202.64.0 (Official Build) stable-channel chell
Chrome OS Platform: 

vendor               | Hewlett-Packard
name                 | Chell
version              | rev4
family               | Google_Glados
  Commands:
    vendor        Display Platform Vendor
    name          Display Platform Product Name
    model         Display Model
    version       Display Platform Version
    family        Display Platform Family
    reset         (Hard-)Reset Platform

Network info: Wireless, WPA2
Kernel: 3.18.0-13759-g98e7e0e 

Please specify Cr-* of the system to which this bug/feature applies (add
the label below).

(I'm unsure what to choose here :().

Steps To Reproduce:
(1) I'm unable to deterministically reproduce this. The best I got is: use laptop normally.

Expected Result:

I expect the shell to not randomly crash.

Actual Result:

When using the system, at random points in time (usually doing something, like opening a new tab), the screen will go black. After a little while, it will jump back to the login screen. All signed in users are logged out. When logging back in, Chrome pops up and tells me it had a crash, asking me whether I want to recover my tabs (the top butter bar).

I'm nearly always logged in with two accounts. First my regular corp account and from that one I log in to my personal account.

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)

I can't reproduce it deterministically, but when using my laptop for a day of work (which I normally only do when I'm WFH, like now), it happens a couple of times a day (today 3 times).

What is the impact to the user, and is there a workaround? If so, what is
it?

The impact is that I lose ~1 minute of productivity every time this happens (it's happened 3 times today) and I lose the state I had filled in on webpages. I also lose my SSH connections. I also lose my concentration.

Please provide any additional information below. Attach a screen shot or
log if possible.

When looking at chrome://version, I see a non-null value where I don't expect any:

i915_error_state
 <base64>: /Td6WFoAAATm1rRGAgAhARYAAAB0L+WjAQAYbm8gZXJyb3Igc3RhdGUgY29sbGVjdGVkCgAAAAB6shsowWrJ8QABMRlZGrCCH7bzfQEAAAAABFla

Which other log files could I supply to diagnose this issue? If required, I give full permission to view my (historical) system state for the purpose of diagnosing this issue, should you have/need it.