CHROME VERSION: 64.0.3282.79 beta
CHROMEOS_AUSERVER: <URL: 4>
CHROMEOS_RELEASE_BOARD: caroline-signed-mpkeys

What steps will reproduce the problem?
(1) Unlock device

What is the expected result?
See desktop background

What happens instead?
Background is blurred, see feedback report: https://listnr.corp.google.com/product/208/report/84965165093