Two tweaks for asan builds

mojo/tools/mojob.py

 #!/usr/bin/env python
 # 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.
 
 # This a simple script to make building/testing Mojo components easier.
 
 import argparse
 from copy import deepcopy
 import os
@@ skipping 135 matching lines @@
     return subprocess.call(['ninja', '-C', out_dir, 'root'])
 
 
 def _run_tests(config, test_types):
   """Runs the tests of the given type(s) for the given config."""
 
   assert isinstance(test_types, list)
   config = deepcopy(config)
   config.values['test_types'] = test_types
 
+  if _get_gn_arg_value(_get_out_dir(config), 'is_asan') == 'true':
+    config.values["sanitizer"] = Config.SANITIZER_ASAN
+
   test_list = GetTestList(config)
   dry_run = config.values.get('dry_run')
   final_exit_code = 0
   for entry in test_list:
     print 'Running: %s' % entry['name']
     print 'Command: %s' % entry['command']
     if dry_run:
       continue
 
     exit_code = subprocess.call(entry['command'])
@@ skipping 98 matching lines @@
       help='Run Dart unit tests (does not build).')
   darttest_parser.set_defaults(func=darttest)
 
   args = parser.parse_args()
   config = _args_to_config(args)
   return args.func(config)
 
 
 if __name__ == '__main__':
   sys.exit(main())