[devil] Extract logging common behavior to its own module.

devil/devil/android/tools/screenshot.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 """Takes a screenshot from an Android device."""
 
 import argparse
 import logging
 import os
 import sys
 
 if __name__ == '__main__':
   sys.path.append(os.path.abspath(os.path.join(
       os.path.dirname(__file__), '..', '..', '..')))
 from devil.android import device_utils
 from devil.android.tools import script_common
+from devil.utils import logging_common
 
 logger = logging.getLogger(__name__)
 
 
 def main():
   # Parse options.
   parser = argparse.ArgumentParser(description=__doc__)
+  logging_common.AddLoggingArguments(parser)
   script_common.AddDeviceArguments(parser)
   parser.add_argument('-f', '--file', metavar='FILE',
                       help='Save result to file instead of generating a '
                            'timestamped file name.')
-  parser.add_argument('-v', '--verbose', action='store_true',
-                      help='Verbose logging.')
   parser.add_argument('host_file', nargs='?',
                       help='File to which the screenshot will be saved.')
 
   args = parser.parse_args()
-
   host_file = args.host_file or args.file
-
-  if args.verbose:
-    logging.getLogger().setLevel(logging.DEBUG)
+  logging_common.InitializeLogging(args)
 
   devices = script_common.GetDevices(args.devices, args.blacklist_file)
 
   def screenshot(device):
     f = None
     if host_file:
       root, ext = os.path.splitext(host_file)
       f = '%s_%s%s' % (root, str(device), ext)
     f = device.TakeScreenshot(f)
     print 'Screenshot for device %s written to %s' % (
         str(device), os.path.abspath(f))
 
   device_utils.DeviceUtils.parallel(devices).pMap(screenshot)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())