PRESUBMIT: use "master." prefix in CQ_INCLUDE_TRYBOTS.

PRESUBMIT.py

 # 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 2164 matching lines @@
 
 
 def GetTryServerMasterForBot(bot):
   """Returns the Try Server master for the given bot.
 
   It tries to guess the master from the bot name, but may still fail
   and return None.  There is no longer a default master.
   """
   # Potentially ambiguous bot names are listed explicitly.
   master_map = {
-      'chromium_presubmit': 'tryserver.chromium.linux',
-      'tools_build_presubmit': 'tryserver.chromium.linux',
+      'chromium_presubmit': 'master.tryserver.chromium.linux',
+      'tools_build_presubmit': 'master.tryserver.chromium.linux',
   }
   master = master_map.get(bot)
   if not master:
     if 'android' in bot:
-      master = 'tryserver.chromium.android'
+      master = 'master.tryserver.chromium.android'
     elif 'linux' in bot or 'presubmit' in bot:
-      master = 'tryserver.chromium.linux'
+      master = 'master.tryserver.chromium.linux'
     elif 'win' in bot:
-      master = 'tryserver.chromium.win'
+      master = 'master.tryserver.chromium.win'
     elif 'mac' in bot or 'ios' in bot:
-      master = 'tryserver.chromium.mac'
+      master = 'master.tryserver.chromium.mac'
   return master
 
 
 def GetDefaultTryConfigs(bots):
   """Returns a list of ('bot', set(['tests']), filtered by [bots].
   """
 
   builders_and_tests = dict((bot, set(['defaulttests'])) for bot in bots)
 
   # Build up the mapping from tryserver master to bot/test.
@@ skipping 10 matching lines @@
   results.extend(input_api.canned_checks.CheckTreeIsOpen(
       input_api,
       output_api,
       json_url='http://chromium-status.appspot.com/current?format=json'))
 
   results.extend(input_api.canned_checks.CheckChangeHasBugField(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasDescription(
       input_api, output_api))
   return results