UserAgent: Mozilla/5.0 (X11; CrOS armv7l 9000.29.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.28 Safari/537.36
Platform: 9000.29.0 (Official Build) beta-channel nyan_big

Steps to reproduce the problem:
I haven't worked out a way to repro this -- as far as I can tell, it happens randomly.

What is the expected behavior?

What went wrong?
CrOS randomly freezes and reboots. The cursor stops moving, the device gets very warm, then a few seconds later the screen blanks and the devmode "OS verification disabled" screen appears. From there, boot proceeds as normal.

It doesn't appear to be linked to memory usage, since I've had it happen with as few as 3 tabs open, although I can't say for sure.

Crashed report ID: 

How much crashed? Whole browser

Is it a problem with a plugin? N/A 

Did this work before? Yes on Chrome 55? It's been working fine for months.

Chrome version: 56.0.2924.28  Channel: beta
OS Version: 9000.29.0
Flash Version: Shockwave Flash 24.0 r0

There's nothing in chrome://crashes, so I (unhelpfully) don't have any logs.