Add a new master for chromium on chromium OS

masters/master.chromium/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 34 matching lines @@
     'bits': '32',
   },
   {
     'master': 'Chromium',
     'hostname': 'build25-m1',
     'builder': 'Linux x64',
     'os': 'linux',
     'version': 'lucid',
     'bits': '64',
   },
-  {
-    'master': 'Chromium',
-    'hostname': 'build8-m1',
-    'builder': 'Arm',
-    'os': 'linux',
-    'version': 'lucid',
-    'bits': '64',
-  },
 ################################################################################
 # Linux Touch
 ################################################################################
   {
     'master': 'Chromium',
     'hostname': 'build23-m1',
     'builder': 'Linux Touch',
     'os': 'linux',
     'version': 'lucid',
     'bits': '64',
@@ skipping 484 matching lines @@
   },
   {
     'master': 'Chromium',
     'builder': 'Linux Clang (ChromiumOS dbg)',
     'hostname': 'vm116-m1',
     'os': 'linux',
     'version': 'lucid',
     'bits': '64',
   },
 ]