Fixes dispatch files to return exit codes in several places

build/android/pylib/browsertests/dispatch.py

 # 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.
 
 """Dispatches content_browsertests."""
 
 import logging
 import os
 import sys
 
 from pylib import android_commands
 from pylib import cmd_helper
 from pylib import constants
 from pylib import ports
+from pylib.base import base_test_result
 from pylib.base import shard
 from pylib.gtest import dispatch as gtest_dispatch
 from pylib.gtest import test_runner
 from pylib.utils import report_results
 
 sys.path.insert(0,
                 os.path.join(constants.DIR_SOURCE_ROOT, 'build', 'util', 'lib'))
 from common import unittest_util
 
 
 def Dispatch(options):
   """Dispatches all content_browsertests.
 
   Args:
     options: optparse.Options object containing command-line options
   Returns:
     A tuple of (base_test_result.TestRunResults object, exit code).
   Raises:
     Exception: Failed to reset the test server port.
   """
 
   attached_devices = []
   if options.test_device:
     attached_devices = [options.test_device]
   else:
     attached_devices = android_commands.GetAttachedDevices()
 
   if not attached_devices:
     logging.critical('A device must be attached and online.')
-    return 1
+    return (base_test_result.TestRunResults(), constants.ERROR_EXIT_CODE)
 
   # Reset the test port allocation. It's important to do it before starting
   # to dispatch any tests.
   if not ports.ResetTestServerPortAllocation():
     raise Exception('Failed to reset test server port.')
 
   test_suite_dir = os.path.join(cmd_helper.OutDirectory.get(),
                                 options.build_type)
   options.test_suite = os.path.join(test_suite_dir,
                                     'apks',
@@ skipping 51 matching lines @@
   fixture, case = test.split('.', 1)
   if _StartsWith(fixture, case, 'PRE_'):
     return False
   if _StartsWith(fixture, case, 'MANUAL_'):
     return False
   return True
 
 
 def _StartsWith(a, b, prefix):
   return a.startswith(prefix) or b.startswith(prefix)