WebRTC: Refactor builder configs to reduce duplication.

masters/master.chromium.webrtc/master_linux_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.changes.filter import ChangeFilter
-from buildbot.schedulers.basic import SingleBranchScheduler
-
-from master.factory import annotator_factory
-
-m_annotator = annotator_factory.AnnotatorFactory()
-
-def Update(c):
-  c['schedulers'].extend([
-      SingleBranchScheduler(name='linux_rel_scheduler',
-                            change_filter=ChangeFilter(project='chromium',
-                                                       branch='master'),
-                            treeStableTimer=60,
-                            builderNames=['Linux Builder']),
-  ])
-  specs = [
-    {'name': 'Linux Builder'},
-    {'name': 'Linux Tester'},
-  ]
-
-  c['builders'].extend([
-      {
-        'name': spec['name'],
-        'factory': m_annotator.BaseFactory('webrtc/chromium'),
-        'category': 'linux',
-        'notify_on_missing': True,
-      } for spec in specs
-  ])