Flunk the build if no Android devices are online.

build/android/buildbot/bb_device_steps.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.
 
 import collections
 import glob
 import json
 import multiprocessing
 import optparse
@@ skipping 244 matching lines @@
   SpawnCmd(['build/android/adb_logcat_monitor.py', logcat_dir])
 
   # Wait for logcat_monitor to pull existing logcat
   RunCmd(['sleep', '5'])
 
   if options.reboot:
     RebootDevices()
 
   # Device check and alert emails
   buildbot_report.PrintNamedStep('device_status_check')
-  RunCmd(['build/android/device_status_check.py'], flunk_on_failure=False)
+  RunCmd(['build/android/device_status_check.py'])
 
   if options.install:
     test_obj = INSTRUMENTATION_TESTS[options.install]
     InstallApk(options, test_obj, print_step=True)
 
   if 'chromedriver' in options.test_filter:
     RunChromeDriverTests()
   if 'unit' in options.test_filter:
     RunTestSuites(options, gtest_config.STABLE_TEST_SUITES)
   if 'ui' in options.test_filter:
@@ skipping 77 matching lines @@
       'slave', 'android'))
   if os.path.exists(build_internal_android):
     android_paths.insert(0, build_internal_android)
   os.environ['PATH'] = os.pathsep.join(android_paths + [os.environ['PATH']])
 
   MainTestWrapper(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))