Make sharding_supervisor.py pass the --verbose flag on to run_test_cases.py

tools/sharding_supervisor/sharding_supervisor.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.
 
 """Defer to run_test_cases.py."""
 
 import os
 import optparse
 import sys
 
 ROOT_DIR = os.path.dirname(
     os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 
 def pop_known_arguments(args):
   """Extracts known arguments from the args if present."""
   rest = []
   run_test_cases_extra_args = []
   for arg in args:
     if arg.startswith(('--gtest_filter=', '--gtest_output=', '--clusters=')):
       run_test_cases_extra_args.append(arg)
-    elif arg == '--run-manual':
+    elif arg in ('--run-manual', '--verbose'):
       run_test_cases_extra_args.append(arg)
     elif arg == '--gtest_print_time':
       # Ignore.
       pass
     elif 'interactive_ui_tests' in arg:
       # Run this test in a single thread. It is useful to run it under
       # run_test_cases so automatic flaky test workaround is still used.
       run_test_cases_extra_args.append('-j1')
       rest.append(arg)
     elif 'browser_tests' in arg:
@@ skipping 59 matching lines @@
 
   run_test_cases_extra_args, rest = pop_known_arguments(args)
 
   import run_test_cases  # pylint: disable=F0401
 
   return run_test_cases.main(cmd + run_test_cases_extra_args + ['--'] + rest)
 
 
 if __name__ == '__main__':
   sys.exit(main())