[Android] Add CLI for flashing devices.

build/android/pylib/constants/__init__.py

 # 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.
 
 """Defines a set of constants shared by test runners and other scripts."""
 
 # TODO(jbudorick): Split these constants into coherent modules.
 
 # pylint: disable=W0212
 
 import collections
 import logging
 import os
 import subprocess
 
 import devil.android.sdk.keyevent
 from devil.android.sdk import version_codes
+from devil.constants import exit_codes
 
 keyevent = devil.android.sdk.keyevent
 
 
 DIR_SOURCE_ROOT = os.environ.get('CHECKOUT_SOURCE_ROOT',
     os.path.abspath(os.path.join(os.path.dirname(__file__),
                                  os.pardir, os.pardir, os.pardir, os.pardir)))
 
 PackageInfo = collections.namedtuple('PackageInfo',
     ['package', 'activity', 'cmdline_file', 'devtools_socket',
@@ skipping 245 matching lines @@
   # set it here.
   try:
     with file(os.devnull, 'w') as devnull:
       subprocess.call(['adb', 'version'], stdout=devnull, stderr=devnull)
     return 'adb'
   except OSError:
     logging.debug('No adb found in $PATH, fallback to checked in binary.')
     return os.path.join(ANDROID_SDK_ROOT, 'platform-tools', 'adb')
 
 # Exit codes
-ERROR_EXIT_CODE = 1
-INFRA_EXIT_CODE = 87
-WARNING_EXIT_CODE = 88
+ERROR_EXIT_CODE = exit_codes.ERROR
+INFRA_EXIT_CODE = exit_codes.INFRA
+WARNING_EXIT_CODE = exit_codes.WARNING