Chrome Version: Google Chrome	70.0.3538.41 (Official Build) beta (64-bit)
OS: (Platform	11021.34.0 (Official Build) beta-channel eve

What steps will reproduce the problem?
(1) Take a selected area screenshot
(2) Chrome OS crashes (both beta 70 and stable 69)

What is the expected result?
Capture a screenshot and don't crash the entire OS

What happens instead?
The OS crashes and everything must be reloaded.


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If this is a regression (i.e., worked before), please consider using the
bisect tool (https://www.chromium.org/developers/bisect-builds-py) to help
us identify the root cause and more rapidly triage the issue.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.