Added call to stop goma in case it's still running from a build that timed out. Added --verbose par…

tools/prepare-bisect-perf-regression.py

 #!/usr/bin/env python
 # 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.
 
 """Prepare Performance Test Bisect Tool
 
 This script is used by a trybot to create a working directory and sync an
 initial copy of the depot for use in bisecting performance regressions.
 
@@ skipping 31 matching lines @@
                     action="store_true",
                     help='Add extra annotation output for buildbot.')
   (opts, args) = parser.parse_args()
 
   if not opts.working_directory:
     print 'Error: missing required parameter: --working_directory'
     print
     parser.print_help()
     return 1
 
-  return bisect_utils.CreateBisectDirectoryAndSetupDepot(opts)
+  return bisect_utils.CreateBisectDirectoryAndSetupDepot(opts, True)
 
 
 if __name__ == '__main__':
   sys.exit(main())