old_contents: #!/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.
  
  """Entry point for the dartium buildbots.
  
  This script is called from buildbot and reports results using the buildbot
  annotation scheme.
  """
  
  import optparse
  import sys
  
  from common import chromium_utils
  
  
  def main():
    parser = optparse.OptionParser()
    chromium_utils.AddPropertiesOptions(parser)
    options, _ = parser.parse_args()
    master_name = options.build_properties.get('mastername')
  
    if master_name == 'client.dart':
      return chromium_utils.RunCommand(
          [sys.executable,
           'src/build/buildbot_annotated_steps.py',
          ])
    else:
      raise RuntimeError('Unrecognized master: ' + master_name)
  
  
  if __name__ == '__main__':
    sys.exit(main())
  
new_contents: #!/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.
  
  """Entry point for the dartium buildbots.
  
  This script is called from buildbot and reports results using the buildbot
  annotation scheme.
  """
  
  import sys
  
  from common import chromium_utils
  
  
  def main():
    return chromium_utils.RunCommand(
        [sys.executable,
         'src/build/buildbot_annotated_steps.py',
        ])
  
  if __name__ == '__main__':
    sys.exit(main())
  
subject: Remove master check from dart_buildbot_run.py