git cl try: Remove --name option, stop sending "reason" property.

When triggering the build, there's a field called "reason",
which is currently populated by default with the user's
branch name.

I have a feeling that this is optional and could be completely
omitted.

Andrii notes that if users want to send a "reason" string,
they could send invoke git cl try with the argument -p reason="<reason>".

PSA on infra-dev:
https://groups.google.com/a/chromium.org/d/msg/infra-announce/PXkM1WinTYY/w2IvN5B4AwAJ

BUG=659552

Review-Url: https://codereview.chromium.org/2428383010

git_cl.py

@@ -509,7 +509,6 @@ def _trigger_try_jobs(auth_config, changelist, buckets, options,
               'patch_project': project,
               'patch_storage': 'rietveld',
               'patchset': patchset,
-              'reason': options.name,
               'rietveld': codereview_url,
           },
       }
@@ -4844,9 +4843,6 @@ def CMDtry(parser, args):
            'json if decodable, or as string otherwise. '
            'NOTE: using this may make your try job not usable for CQ, '
            'which will then schedule another try job with default properties')
-  # TODO(tandrii): if this even used?
-  group.add_option(
-      '-n', '--name', help='Try job name; default to current branch name')
   group.add_option(
       '--buildbucket-host', default='cr-buildbucket.appspot.com',
       help='Host of buildbucket. The default host is %default.')
@@ -4877,9 +4873,6 @@ def CMDtry(parser, args):
   if error_message:
     parser.error('Can\'t trigger try jobs: %s' % error_message)
 
-  if not options.name:
-    options.name = cl.GetBranch()
-
   if options.bucket and options.master:
     parser.error('Only one of --bucket and --master may be used.')
 

tests/git_cl_test.py

@@ -1950,7 +1950,6 @@ class TestGitCl(TestCase):
            u'patch_project': u'depot_tools',
            u'patch_storage': u'rietveld',
            u'patchset': 20001,
-           u'reason': u'feature',  # This is a branch name, but why?
            u'rietveld': u'https://codereview.chromium.org',
         }
       })
@@ -2004,7 +2003,6 @@ class TestGitCl(TestCase):
            u'patch_project': u'depot_tools',
            u'patch_storage': u'rietveld',
            u'patchset': 20001,
-           u'reason': u'feature',  # This is a branch name, but why?
            u'rietveld': u'https://codereview.chromium.org',
         }
       })