Fix build/android/enable_asserts.py.

build/android/enable_asserts.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012 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.
 
 """Enables dalvik vm asserts in the android device."""
 
+from pylib import android_commands
 from pylib.device import device_utils
 import optparse
 import sys
 
 
 def main(argv):
   option_parser = optparse.OptionParser()
   option_parser.add_option('--enable_asserts', dest='set_asserts',
       action='store_true', default=None,
       help='Sets the dalvik.vm.enableassertions property to "all"')
   option_parser.add_option('--disable_asserts', dest='set_asserts',
       action='store_false', default=None,
       help='Removes the dalvik.vm.enableassertions property')
   options, _ = option_parser.parse_args(argv)
 
-  device = device_utils.DeviceUtils()
-  if options.set_asserts != None:
-    if device.old_interface.SetJavaAssertsEnabled(options.set_asserts):
-      device.old_interface.Reboot(full_reboot=False)
+  devices = android_commands.GetAttachedDevices()
+  for device in [device_utils.DeviceUtils(serial) for serial in devices]:

[jbudorick, 2014/04/23 15:29:58]

I think it'd be good to have this optionally accept a serial number and only
enable assertions for that device if it's present. I'm ok with you TODOing me on
that if you don't want to do it in here, though.

+    if options.set_asserts != None:
+      if device.old_interface.SetJavaAssertsEnabled(options.set_asserts):
+        device.old_interface.Reboot(full_reboot=False)
 
 
 if __name__ == '__main__':
   main(sys.argv)