Add scripts to list or trace all test cases in a gtest executable.

tools/isolate/isolate.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.
 
 """Does one of the following depending on the --mode argument:
   check     Verifies all the inputs exist, touches the file specified with
             --result and exits.
   hashtable Puts a manifest file and hard links each of the inputs into the
             output directory.
@@ skipping 688 matching lines @@
       metavar='FOO BAR',
       help='Variables to process in the .isolate file, default: %default')
   parser.add_option(
       '-o', '--outdir', metavar='DIR',
       help='Directory used to recreate the tree or store the hash table. '
            'If the environment variable ISOLATE_HASH_TABLE_DIR exists, it will '
            'be used. Otherwise, for run and remap, uses a /tmp subdirectory. '
            'For the other modes, defaults to the directory containing --result')
 
   options, args = parser.parse_args()
-  level = [logging.ERROR, logging.INFO, logging.DEBUG][min(2, options.verbose)]
+  levels = [logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG]
   logging.basicConfig(
-      level=level,
+      level=levels[min(len(levels)-1, options.verbose)],
       format='%(levelname)5s %(module)15s(%(lineno)3d): %(message)s')
 
   if not options.mode:
     parser.error('--mode is required')
   if not options.result:
     parser.error('--result is required.')
 
   if len(args) > 1:
     logging.debug('%s' % sys.argv)
     parser.error('Use only one argument which should be a .isolate file')
@@ skipping 21 matching lines @@
       result_file,
       input_file,
       options.mode,
       variables,
       out_dir,
       parser.error)
 
 
 if __name__ == '__main__':
   sys.exit(main())