Revert of Use -s to pass string date to 'adb shell date' command to set date in provision.

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 172 matching lines @@
         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()
-    device.RunShellCommand('date -s %s' % time.strftime('%Y%m%d.%l%M%S'),
-                           as_root=True)
+    device.RunShellCommand('date -u %f' % time.time(), as_root=True)
     # TODO(jbudorick): Tune the timeout per OS version.
     device.Reboot(True, timeout=600, retries=0)
     props = device.RunShellCommand('getprop')
     for prop in props:
       logging.info('  %s' % prop)
     if options.auto_reconnect:
       PushAndLaunchAdbReboot(device, options.target)
   except (errors.WaitForResponseTimedOutError,
           device_errors.CommandTimeoutError):
     logging.info('Timed out waiting for device %s. Adding to blacklist.',
@@ skipping 45 matching lines @@
 
   if args:
     print >> sys.stderr, 'Unused args %s' % args
     return 1
 
   return ProvisionDevices(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))