tools/roll_deps: add '-m tryserver.chromium' to git-cl-try

tools/roll_deps.py

 #!/usr/bin/python2
 
 # Copyright 2014 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Skia's Chromium DEPS roll script.
 
 This script:
@@ skipping 347 matching lines @@
 
     vsp.check_call([git, 'commit', '-q', '-m', message])
 
     git_cl = [git, 'cl', 'upload', '-f',
               '--bypass-hooks', '--bypass-watchlists']
     if config.cc_list:
         git_cl.append('--cc=%s' % config.cc_list)
     if config.reviewers_list:
         git_cl.append('--reviewers=%s' % config.reviewers_list)
 
-    git_try = [git, 'cl', 'try', '--revision', svn_info]
+    git_try = [
+        git, 'cl', 'try', '-m', 'tryserver.chromium', '--revision', svn_info]
     git_try.extend([arg for bot in config.cl_bot_list for arg in ('-b', bot)])
 
     branch_name = git_utils.git_branch_name(vsp.verbose)
 
     if config.skip_cl_upload:
         space = '   '
         print 'You should call:'
         print '%scd %s' % (space, os.getcwd())
         misc_utils.print_subprocess_args(space, [git, 'checkout', branch_name])
         misc_utils.print_subprocess_args(space, git_cl)
@@ skipping 153 matching lines @@
     if not git_utils.git_executable():
         option_parser.error('Invalid git executable.')
 
     config = DepsRollConfig(options)
     find_hash_and_roll_deps(config, options.revision, options.git_hash)
 
 
 if __name__ == '__main__':
     main(sys.argv[1:])