Update from https://crrev.com/317530

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 json
 import logging
 import optparse
@@ skipping 319 matching lines @@
   offline_devices = android_commands.GetAttachedDevices(
       hardware=False, emulator=False, offline=True)
 
   types, builds, batteries, reports, errors, json_data = [], [], [], [], [], []
   fail_step_lst = []
   if devices:
     types, builds, batteries, reports, errors, fail_step_lst, json_data = (
         zip(*[DeviceInfo(dev, options) for dev in devices]))
 
   # Write device info to file for buildbot info display.
-  with open('/home/chrome-bot/.adb_device_info', 'w') as f:
-    for device in json_data:
-      f.write('%s %s %s %.1fC %s%%\n' % (device['serial'], device['type'],
-          device['build'], float(device['battery']['temperature']) / 10,
-          device['battery']['level']))
+  if os.path.exists('/home/chrome-bot'):
+    with open('/home/chrome-bot/.adb_device_info', 'w') as f:
+      for device in json_data:
+        f.write('%s %s %s %.1fC %s%%\n' % (device['serial'], device['type'],
+            device['build'], float(device['battery']['temperature']) / 10,
+            device['battery']['level']))
 
   err_msg = CheckForMissingDevices(options, devices) or []
 
   unique_types = list(set(types))
   unique_builds = list(set(builds))
 
   bb_annotations.PrintMsg('Online devices: %d. Device types %s, builds %s'
                            % (len(devices), unique_types, unique_builds))
   print '\n'.join(reports)
 
@@ skipping 36 matching lines @@
 
   if num_failed_devs == len(devices):
     return 2
 
   if not devices:
     return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())