Update git cl try command to mention tryserver.chromium.linux.

git_cl.py

 #!/usr/bin/env python
 # 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 import datetime
@@ skipping 2275 matching lines @@
 
   props = cl.GetIssueProperties()
   if props.get('private'):
     parser.error('Cannot use trybots with private issue')
 
   if not options.name:
     options.name = cl.GetBranch()
 
   if options.bot and not options.master:
     parser.error('For manually specified bots please also specify the '
-                 'tryserver master, e.g. "-m tryserver.chromium".')
+                 'tryserver master, e.g. "-m tryserver.chromium.linux".')

[James Cook, 2014/07/25 16:27:40]

drive-by: Can this list the names of all the available tryservers? I rely on
this error message to figure out the correct choice.

 
   def GetMasterMap():
     # Process --bot and --testfilter.
     if not options.bot:
       change = cl.GetChange(cl.GetCommonAncestorWithUpstream(), None)
 
       # Get try masters from PRESUBMIT.py files.
       masters = presubmit_support.DoGetTryMasters(
           change,
           change.LocalPaths(),
@@ skipping 342 matching lines @@
         ('AppEngine is misbehaving and returned HTTP %d, again. Keep faith '
           'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
 
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   colorama.init()
   sys.exit(main(sys.argv[1:]))