Apply patch for bot_update

scripts/master/factory/commands.py

 # 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.
 
 """Set of utilities to add commands to a buildbot factory (BuildFactory).
 
 All the utility functions to add steps to a build factory here are not
 project-specific. See the other *_commands.py for project-specific commands.
 """
 
@@ skipping 938 matching lines @@
 
     for property_name, property_expr in PROPERTIES.iteritems():
       property_value = WithProperties(property_expr)
       if property_value:
         cmd.extend(['--%s' % property_name, property_value])
 
     if server:
       cmd.extend(['--rietveld_server', server])
 
     if revision_mapping:
-      cmd.extend(['--revision-mapping=%s' % json.dumps(revision_mapping)])
+      cmd.extend(['--revision_mapping=%s' % json.dumps(revision_mapping)])
 
     self._factory.addStep(
         chromium_step.AnnotatedCommand,
         name='bot_update',
         description='bot_update',
         haltOnFailure=True,
         flunkOnFailure=True,
         timeout=600,
         workdir=self.working_dir,
         command=cmd)
@@ skipping 332 matching lines @@
 
   def commandComplete(self, cmd):
     out = cmd.logs['stdio'].getText()
     build_properties = re.findall('BUILD_PROPERTY ([^=]*)=(.*)', out)
     for propname, value in build_properties:
       # findall can return strings containing CR characters, remove with strip.
       self.build.setProperty(propname, value.strip(), 'Step')
 
   def getText(self, cmd, results):
     return self.describe(True) + self.messages