Chrome Version: 70.0.3508.0
OS: ChromeOS on betty

What steps will reproduce the problem?
(1) Build ChromeOS and Chrome for betty with enabling vivid.
Currently, some cherry-picking is needed. See crbug.com/852302
(2) Start VM and SSH into it.
(3) Run 'sudo modprobe vivid n_devs=1 node_types=0x1'
(4) Run 'restart ui'

What is the expected result?
cros_camera_service should be restarted after (4).

What happens instead?
cros_camera_service failed to restart.

dmesg gave the flowing log:
[  151.720982] init: arc-kmsg-logger main process (1778) killed by TERM signal
[  151.905615] init: cros-camera main process ended, respawning
[  152.928611] blk_update_request: I/O error, dev loop7, sector 0
[  153.896405] audit: type=1400 audit(1533553616.014:21): avc:  denied  { dac_override } for  pid=2931 comm="logd" capability=1  scontext=u:r:logd:s0 tcontext=u:r:logd:s0 tclass=capability permissive=0
[  153.903394] audit: type=1400 audit(1533553616.021:22): avc:  denied  { dac_read_search } for  pid=2931 comm="logd" capability=2  scontext=u:r:logd:s0 tcontext=u:r:logd:s0 tclass=capability permissive=0
[  153.944614] binder: 2946:2946 transaction failed 29189, size 0-0
[  153.977167] audit: type=1400 audit(1533553616.095:23): avc:  denied  { dac_override } for  pid=2945 comm="logd" capability=1  scontext=u:r:logd:s0 tcontext=u:r:logd:s0 tclass=capability permissive=0
[  153.992049] audit: type=1400 audit(1533553616.110:24): avc:  denied  { dac_read_search } for  pid=2945 comm="logd" capability=2  scontext=u:r:logd:s0 tcontext=u:r:logd:s0 tclass=capability permissive=0
[  154.634175] audit: type=1400 audit(1533553616.752:25): avc:  denied  { dac_read_search } for  pid=2950 comm="main" capability=2  scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=0
[  154.637548] audit: type=1400 audit(1533553616.756:26): avc:  denied  { dac_read_search } for  pid=2950 comm="main" capability=2  scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=0
[  154.640763] audit: type=1400 audit(1533553616.759:27): avc:  denied  { dac_read_search } for  pid=2950 comm="main" capability=2  scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=0
[  154.644916] audit: type=1400 audit(1533553616.762:28): avc:  denied  { dac_read_search } for  pid=2950 comm="main" capability=2  scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=0
[  154.650030] audit: type=1400 audit(1533553616.768:29): avc:  denied  { dac_read_search } for  pid=2950 comm="main" capability=2  scontext=u:r:zygote:s0 tcontext=u:r:zygote:s0 tclass=capability permissive=0
[  154.973529] init: cros-camera main process ended, respawning

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When I execute 'cros_camera_service' manually after it, it started correctly.
Also, without step (3), cros_camera_service restarted.