[Android] Make the test runner terminate gracefully on SIGTERM.

build/android/pylib/local/device/local_device_test_run.py

 # Copyright 2014 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.
 
 import fnmatch
 import imp
 import logging
 import signal
 import thread
 import threading
@@ skipping 74 matching lines @@
 
     class TestsTerminated(Exception):
       pass
 
     def stop_tests(_signum, _frame):
       logging.critical('Received SIGTERM. Stopping test execution.')
       exit_now.set()
       raise TestsTerminated()
 
     try:
-      with signal_handler.AddSignalHandler(signal.SIGTERM, stop_tests):
+      with signal_handler.SignalHandler(signal.SIGTERM, stop_tests):
         tries = 0
         results = []
         while tries < self._env.max_tries and tests:
           logging.info('STARTING TRY #%d/%d', tries + 1, self._env.max_tries)
           logging.info('Will run %d tests on %d devices: %s',
                        len(tests), len(self._env.devices),
                        ', '.join(str(d) for d in self._env.devices))
           for t in tests:
             logging.debug('  %s', t)
 
@@ skipping 81 matching lines @@
 
   def _RunTest(self, device, test):
     raise NotImplementedError
 
   def _ShouldShard(self):
     raise NotImplementedError
 
 
 class NoTestsError(Exception):
   """Error for when no tests are found."""