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

devil/devil/android/tools/cpufreq.py

Index: devil/devil/android/tools/cpufreq.py
diff --git a/devil/devil/android/tools/cpufreq.py b/devil/devil/android/tools/cpufreq.py
index 8eb0fbd2b4f1ed864e133cac487a3a27e1b326df..6ce0affdc26f16f9d1dcfe8f07184e39b417e5be 100755
--- a/devil/devil/android/tools/cpufreq.py
+++ b/devil/devil/android/tools/cpufreq.py
@@ -18,7 +18,7 @@ if __name__ == '__main__':
 from devil.android import device_utils
 from devil.android.perf import perf_control
 from devil.android.tools import script_common
-from devil.utils import run_tests_helper
+from devil.utils import logging_common
 
 
 def SetScalingGovernor(device, args):
@@ -40,13 +40,11 @@ def ListAvailableGovernors(device, _args):
 
 def main(raw_args):
   parser = argparse.ArgumentParser()
+  logging_common.AddLoggingArguments(parser)
   script_common.AddEnvironmentArguments(parser)
   parser.add_argument(
       '--device', dest='devices', action='append', default=[],
       help='Devices for which the governor should be set. Defaults to all.')
-  parser.add_argument(
-      '-v', '--verbose', action='count',
-      help='Log more.')
 
   subparsers = parser.add_subparsers()
 
@@ -64,7 +62,7 @@ def main(raw_args):
 
   args = parser.parse_args(raw_args)
 
-  run_tests_helper.SetLogLevel(args.verbose)
+  logging_common.InitializeLogging(args)
   script_common.InitializeEnvironment(args)
 
   devices = device_utils.DeviceUtils.HealthyDevices(device_arg=args.devices)