Add support for running comparison of dart2js and dart2js with --dump-info output to the bots.

client/tools/buildbot_annotated_steps.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Copyright (c) 2011 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.
 
 """Dart client buildbot steps
@@ skipping 183 matching lines @@
     status = ProcessBot(name, 'android')
   elif name.startswith('cross') or name.startswith('target'):
     status = ProcessBot(name, 'cross-vm',
                         custom_env=EnvironmentWithoutBotoConfig())
   elif name.startswith('linux-distribution-support'):
     status = ProcessBot(name, 'linux_distribution_support')
   elif name.startswith('ft'):
     status = ProcessBot(name, 'functional_testing')
   elif name.startswith('version-checker'):
     status = ProcessBot(name, 'version_checker')
+  elif name.startswith('dart2js-dump-info'):
+    status = ProcessBot(name, 'dart2js_dump_info')
   else:
     status = ProcessBot(name, 'compiler')
 
   if status:
     print '@@@STEP_FAILURE@@@'
 
   return status
 
 
 if __name__ == '__main__':
   sys.exit(main())