Make battery level an option for android provision devices.

build/android/provision_devices.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.
 
 """Provisions Android devices with settings required for bots.
 
 Usage:
   ./provision_devices.py [-d <device serial number>]
@@ skipping 161 matching lines @@
       # Some perf bots run benchmarks with USB charging disabled which leads
       # to gradual draining of the battery. We must wait for a full charge
       # before starting a run in order to keep the devices online.
       try:
         battery_info = device.old_interface.GetBatteryInfo()
       except Exception as e:
         battery_info = {}
         logging.error('Unable to obtain battery info for %s, %s',
                       str(device), e)
 
-      while int(battery_info.get('level', 100)) < 95:
+      while int(battery_info.get('level', 100)) < options.min_battery_level:
         if not device.old_interface.IsDeviceCharging():
           if device.old_interface.CanControlUsbCharging():
             device.old_interface.EnableUsbCharging()
           else:
             logging.error('Device is not charging')
             break
         logging.info('Waiting for device to charge. Current level=%s',
                      battery_info.get('level', 0))
         time.sleep(60)
         battery_info = device.old_interface.GetBatteryInfo()
@@ skipping 37 matching lines @@
   return 0
 
 
 def main(argv):
   custom_handler = logging.StreamHandler(sys.stdout)
   custom_handler.setFormatter(run_tests_helper.CustomFormatter())
   logging.getLogger().addHandler(custom_handler)
   logging.getLogger().setLevel(logging.INFO)
 
   parser = optparse.OptionParser()
+  parser.add_option('--min-battery-level', default=95, type='int',
+                    help="Minimum battery level for performance testing "
+                         "(default: 95).")
   parser.add_option('--skip-wipe', action='store_true', default=False,
                     help="Don't wipe device data during provisioning.")
   parser.add_option('--disable-location', action='store_true', default=False,
                     help="Disallow Google location services on devices.")
   parser.add_option('-d', '--device',
                     help='The serial number of the device to be provisioned')
   parser.add_option('-t', '--target', default='Debug', help='The build target')
   parser.add_option(
       '-r', '--auto-reconnect', action='store_true',
       help='Push binary which will reboot the device on adb disconnections.')
   options, args = parser.parse_args(argv[1:])
   constants.SetBuildType(options.target)
 
   if args:
     print >> sys.stderr, 'Unused args %s' % args
     return 1
 
   return ProvisionDevices(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))