Fix presubmit recipe to fetch description from rietveld.

scripts/slave/recipes/run_presubmit.py

 # 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.
 
 def GetFactoryProperties(api, factory_properties, build_properties):
   # TODO(iannucci): Pass the build repo info directly via build_properties
   repo_name = factory_properties.get('repo_name')
   steps = api.Steps(build_properties)
 
   spec = steps.gclient_common_spec(repo_name)
@@ skipping 10 matching lines @@
   return {
     'checkout': 'gclient',
     'gclient_spec': spec,
     'steps': git_steps + [
       steps.apply_issue_step(),
       steps.step('presubmit', [
         api.depot_tools_path('presubmit_support.py'),
         '--root', api.checkout_path(),
         '--commit',
         '--verbose', '--verbose',
-        '--author', build_properties['blamelist'][0],
         '--issue', build_properties['issue'],
         '--patchset', build_properties['patchset'],
         '--skip_canned', 'CheckRietveldTryJobExecution',
         '--skip_canned', 'CheckTreeIsOpen',
         '--skip_canned', 'CheckBuildbotPendingBuilds',
         '--skip_canned', 'CheckOwners',
-        '--rietveld_url', build_properties['rietveld']])
+        '--rietveld_url', build_properties['rietveld'],
+        '--rietveld_fetch'])
     ]
   }