[android] FlagChanger should only require root to set flags for Chrome.

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 54 matching lines @@
   LaunchHostHeartbeat()
 
 
 def ProvisionDevices(options):
   if options.device is not None:
     devices = [options.device]
   else:
     devices = android_commands.GetAttachedDevices()
   for device in devices:
     android_cmd = android_commands.AndroidCommands(device)
-    android_cmd.RunShellCommand('su -c date -u %f' % time.time())
+    android_cmd.RunShellCommandWithSU('date -u %f' % time.time())
   if options.auto_reconnect:
     PushAndLaunchAdbReboot(devices, options.target)
 
 
 def main(argv):
   parser = optparse.OptionParser()
   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
 
   ProvisionDevices(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))