I recently tried to build a custom chromium for my chromium OS and I followed the instructions as explained in this article.
I also added the API keys during build time for activating Google Drive features in Files app.
After building, I successfully deployed the chromium in chromium OS. but when I try to use google drive in files app, I am getting this Error :
This is the Output from chrome://drive-internals
Drive related Preferences
DriveFS: true
gdata.disabled: false
gdata.cellular.disabled: true
drivefs.was_launched_at_least_once: false
drivefs.pinned_migrated: true
Event Log
2019-03-03T18:25:20.596: [warning] DriveFs died, retry in 5 seconds
2019-03-03T18:25:22.907: [info] fileManagerPrivate.getVolumeMetadataList[7] succeeded. (results: '[/home/chronos/u-4c2ec903f735f581712541e25927d99f035564e2/MyFiles, /media/removable/External Drive, /media/removable/External Drive 1, /media/removable/External Drive 2]', 4 mount points)
2019-03-03T18:25:23.098: [info] fileManagerPrivate.getVolumeMetadataList[0] succeeded. (results: '[/home/chronos/u-4c2ec903f735f581712541e25927d99f035564e2/MyFiles, /media/removable/External Drive, /media/removable/External Drive 1, /media/removable/External Drive 2, /media/removable/복구]', 5 mount points)
2019-03-03T18:25:25.600: [warning] DriveFs died, retry in 10 seconds
2019-03-03T18:25:33.605: [info] CWS OAuth token fetch succeeded.
2019-03-03T18:25:35.609: [warning] DriveFs died, retry in 20 seconds
2019-03-03T18:25:55.618: [error] DriveFs keeps failing at start. Giving up.