GetAttachedDevices() should not include bad devices listed in .bad_devices file.

build/android/buildbot/bb_device_status_check.py

 #!/usr/bin/env python
 #
 # Copyright 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.
 
 """A class to keep track of devices across builds and report state."""
 import logging
 import optparse
 import os
@@ skipping 275 matching lines @@
   parser.add_option('--no-provisioning-check', action='store_true',
                     help='Will not check if devices are provisioned properly.')
   parser.add_option('--device-status-dashboard', action='store_true',
                     help='Output device status data for dashboard.')
   parser.add_option('--restart-usb', action='store_true',
                     help='Restart USB ports before running device check.')
   options, args = parser.parse_args()
   if args:
     parser.error('Unknown options %s' % args)
 
+  # Remove the last builds "bad devices" before checking device statuses.
+  android_commands.ResetBadDevices()
+
   if options.restart_usb:
     expected_devices = GetLastDevices(os.path.abspath(options.out_dir))
     devices = android_commands.GetAttachedDevices()
     # Only restart usb if devices are missing.
     if set(expected_devices) != set(devices):
       KillAllAdb()
       retries = 5
       usb_restarted = True
       if not RestartUsb():
         usb_restarted = False
@@ skipping 59 matching lines @@
     # devices with critically low battery or install speed. Remove those devices
     # from testing, allowing build to continue with good devices.
     return 1
 
   if not devices:
     return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())