Add a copy of the "WinClang64 (dbg)" bot to the main waterfall.

masters/master.chromium.win/master_win_cfg.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.
 
 from buildbot.scheduler import Triggerable
 from buildbot.schedulers.basic import SingleBranchScheduler
 
 from master.factory import annotator_factory
 
 m_annotator = annotator_factory.AnnotatorFactory()
 
 def Update(config, active_master, c):
   c['schedulers'].extend([
       SingleBranchScheduler(name='win_src',
                             branch='master',
                             treeStableTimer=60,
                             builderNames=[
           'Win Builder',
           'Win x64 Builder',
           'Win x64 Builder (dbg)',
           'Win Builder (dbg)',
           'Win x64 GN',
           'Win x64 GN (dbg)',
           'Win8 GN (dbg)',
+          'WinClang64 (dbg)',
           'Win8 Aura',
       ]),
   ])
   specs = [
     {'name': 'Win Builder'},
     {'name': 'Win7 (32) Tests'},
     {'name': 'Win7 Tests (1)'},
     {'name': 'Win x64 Builder'},
     {'name': 'Win 7 Tests x64 (1)'},
     {'name': 'Win x64 Builder (dbg)'},
     {'name': 'Win Builder (dbg)'},
     {'name': 'Win7 Tests (dbg)(1)'},
     {'name': 'Win8 Aura'},
     {'name': 'Win x64 GN', 'timeout': 3600},
     {'name': 'Win x64 GN (dbg)'},
     {'name': 'Win8 GN (dbg)'},
+    {'name': 'WinClang64 (dbg)'},
     {'name': 'Win10 Tests x64'},
   ]
 
   c['builders'].extend([
       {
         'name': spec['name'],
         'factory': m_annotator.BaseFactory(
             spec.get('recipe', 'chromium'),
             factory_properties=spec.get('factory_properties'),
             timeout=spec.get('timeout', 2400)),
         'notify_on_missing': True,
         'category': '2windows',
       } for spec in specs
   ])