Convert manually triggered try runs to use bots without _swarming prefix.

PRESUBMIT_test.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.
 
 import glob
 import json
 import os
 import re
 import subprocess
@@ skipping 733 matching lines @@
         'tryserver.chromium.mac': [
             'ios_dbg_simulator',
             'ios_rel_device',
             'ios_rel_device_ninja',
             'mac_asan',
             'mac_asan_64',
             'mac_chromium_compile_dbg',
             'mac_chromium_compile_rel',
             'mac_chromium_dbg',
             'mac_chromium_rel',
-            'mac_chromium_rel_swarming',
             'mac_nacl_sdk',
             'mac_nacl_sdk_build',
             'mac_rel_naclmore',
             'mac_valgrind',
             'mac_x64_rel',
             'mac_xcodebuild',
         ],
         'tryserver.chromium.linux': [
             'android_aosp',
             'android_chromium_gn_compile_dbg',
@@ skipping 22 matching lines @@
             'linux_chromium_chromeos_dbg',
             'linux_chromium_chromeos_rel',
             'linux_chromium_clang_dbg',
             'linux_chromium_clang_rel',
             'linux_chromium_compile_dbg',
             'linux_chromium_compile_rel',
             'linux_chromium_dbg',
             'linux_chromium_gn_dbg',
             'linux_chromium_gn_rel',
             'linux_chromium_rel',
-            'linux_chromium_rel_swarming',
             'linux_chromium_trusty32_dbg',
             'linux_chromium_trusty32_rel',
             'linux_chromium_trusty_dbg',
             'linux_chromium_trusty_rel',
             'linux_clang_tsan',
             'linux_ecs_ozone',
             'linux_layout',
             'linux_layout_asan',
             'linux_layout_rel',
             'linux_layout_rel_32',
             'linux_nacl_sdk',
             'linux_nacl_sdk_bionic',
             'linux_nacl_sdk_bionic_build',
             'linux_nacl_sdk_build',
             'linux_redux',
             'linux_rel_naclmore',
             'linux_rel_precise32',
             'linux_valgrind',
             'tools_build_presubmit',
         ],
         'tryserver.chromium.win': [
             'win8_aura',
             'win8_chromium_dbg',
             'win8_chromium_rel',
             'win_chromium_compile_dbg',
             'win_chromium_compile_rel',
             'win_chromium_dbg',
             'win_chromium_rel',
             'win_chromium_rel',
-            'win_chromium_rel_swarming',
-            'win_chromium_rel_swarming',
             'win_chromium_x64_dbg',
             'win_chromium_x64_rel',
             'win_drmemory',
             'win_nacl_sdk',
             'win_nacl_sdk_build',
             'win_rel_naclmore',
          ],
     }
     for master, bots in bots.iteritems():
       for bot in bots:
         self.assertEqual(master, PRESUBMIT.GetTryServerMasterForBot(bot),
                          'bot=%s: expected %s, computed %s' % (
             bot, master, PRESUBMIT.GetTryServerMasterForBot(bot)))
 
 
 if __name__ == '__main__':
   unittest.main()