specify the reason for blacklisting

build/android/provision_devices.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provisions Android devices with settings required for bots.
 
 Usage:
   ./provision_devices.py [-d <device serial number>]
@@ skipping 104 matching lines @@
     if options.chrome_specific_wipe:
       package = "com.google.android.gms"
       version_name = device.GetApplicationVersion(package)
       logging.info("Version name for %s is %s", package, version_name)
 
     CheckExternalStorage(device)
 
   except device_errors.CommandTimeoutError:
     logging.exception('Timed out waiting for device %s. Adding to blacklist.',
                       str(device))
-    blacklist.Extend([str(device)])
+    blacklist.Extend([str(device)], reason='provision_timeout')
 
   except device_errors.CommandFailedError:
     logging.exception('Failed to provision device %s. Adding to blacklist.',
                       str(device))
-    blacklist.Extend([str(device)])
+    blacklist.Extend([str(device)], reason='provision_failure')
 
 def CheckExternalStorage(device):
   """Checks that storage is writable and if not makes it writable.
 
   Arguments:
     device: The device to check.
   """
   try:
     with device_temp_file.DeviceTempFile(
         device.adb, suffix='.sh', dir=device.GetExternalStoragePath()) as f:
@@ skipping 341 matching lines @@
   args = parser.parse_args()
   constants.SetBuildType(args.target)
 
   run_tests_helper.SetLogLevel(args.verbose)
 
   return ProvisionDevices(args)
 
 
 if __name__ == '__main__':
   sys.exit(main())