Starting at build R57-9188, Jetstream crash report uploading seems to be disabled.

Jetstream boards do not have device policy files and instead use an empty /home/chronos/"Consent To Send Stats" to indicate consent.

The crash_sender utility uses 'metrics_client -c' to check for user consent for uploading crash reports. This previously accepted an empty consent file as an indication of consent. A recent change modified this to check that the consent file contains a UUID:

   https://chromium-review.googlesource.com/#/c/422851/

Since the consent file is empty, 'metrics_client -c' now returns a non-zero exit status and the crash report is not uploaded.

Jetstream is tracking this issue on b/34718501.

This is currently only affecting dev channel devices (internal teamfood).