100644 blob a721dd44fc73c3c09f87144760c3810c41ccd4d6	drive_observer.h
100644 blob b246d52a7bf30bdb4853ed00ffc85018b35515a4	tray_drive.cc
100644 blob 6550fdeda8eece5bbf5b2ce095dc99ea7a238aca	tray_drive.h