Add arm/tegra2 CQ builders and major cleanup of dead code in chromeos_factory.

masters/master.chromiumos/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2011 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 
@@ skipping 65 matching lines @@
     'os': 'linux',
   },
   {
     'master': 'ChromiumOS',
     'builder': 'x86 generic commit queue',
     'hostname': 'build19-m2',
     'os': 'linux',
   },
   {
     'master': 'ChromiumOS',
+    'builder': 'arm generic commit queue',
+    'hostname': 'vm5-m2',
+    'os': 'linux',
+  },
+  {
+    'master': 'ChromiumOS',
+    'builder': 'tegra2 commit queue',
+    'hostname': 'vm6-m2',
+    'os': 'linux',
+  },
+  {
+    'master': 'ChromiumOS',
     'builder': ['amd64 generic full', 'amd64 corei7 full'],
     'hostname': 'build20-m2',
     'os': 'linux',
   },
   {
     'master': 'ChromiumOS',
     'builder': 'tegra2 PFQ',
     'hostname': 'build21-m2',
     'os': 'linux',
   },
  
 ]