Remove _ to fix tree.

cros_mark_as_stable.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """This module uprevs a given package's ebuild to the next revision."""
 
 
 import fileinput
@@ skipping 232 matching lines @@
     Info('Not on branch %s so no work found to push.  Exiting' % stable_branch)
     return
 
   description = _SimpleRunCommand('git log --format=format:%s%n%n%b ' +
                                   tracking_branch)
   description = 'Marking set of ebuilds as stable\n\n%s' % description
   merge_branch_name = 'merge_branch'
   for push_try in range(num_retries + 1):
     try:
       _SimpleRunCommand('git remote update')
-      merge_branch = _GitBranch(merge_branch_name)
+      merge_branch = GitBranch(merge_branch_name)
       merge_branch.CreateBranch()
       if not merge_branch.Exists():
         Die('Unable to create merge branch.')
       _SimpleRunCommand('git merge --squash %s' % _STABLE_BRANCH_NAME)
       _SimpleRunCommand('git commit -m "%s"' % description)
       # Ugh. There has got to be an easier way to push to a tracking branch
       _SimpleRunCommand('git config push.default tracking')
       _SimpleRunCommand('git push')
       break
     except:
@@ skipping 298 matching lines @@
           raise
 
       if revved_packages:
         _CleanStalePackages(gflags.FLAGS.board, revved_packages)
       else:
         work_branch.Delete()
 
 
 if __name__ == '__main__':
   main(sys.argv)