Add win8 aura bot to chromium.win, make tryserver match

masters/master.tryserver.chromium/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 # down slaves don't cause re-allocation, just removal
 down_slaves = [
@@ skipping 365 matching lines @@
       'master': 'TryServer',
       'builder': [
         'win_layout', 'win_layout_rel'
       ],
       'hostname': 'vm%d-m4' % number,
       'os': 'win',
       'version': 'win7',
       'bits': '64',
     } for number in range(521, 525)
   ]
-  ash_aura_slaves = [
+  win7_aura_slaves = [
     {
       'master': 'TryServer',
       'builder': [
-        'win_ash', 'win_aura',
+        'win7_aura',
         'win', 'win_rel_naclmore', 'win_rel'
       ],
       'hostname': 'vm%d-m4' % number,
       'os': 'win',
       'version': 'win7',
       'bits': '64',
     } for number in new_win7
   ]
+  win8_aura_slaves = [
+    {
+      'master': 'TryServer',
+      'builder': [
+        'win8_aura',
+      ],
+      'hostname': 'vm115-m4',
+      'os': 'win',
+      'version': 'win8',
+      'bits': '64',
+    }
+  ]
   drmemory_slaves = [
     {
       'master': 'TryServer',
       # We can also add 'win' to the list of builders but let's not take risks
       # as this is the only Win7 tryslave now.
       'builder': ['win_drmemory'],
       'hostname': 'vm%d-m4' % i,
       'os': 'win',
       'version': 'win7',
       'bits': '64',
@@ skipping 62 matching lines @@
       'os': 'win',
       'version': 'win7',
       'bits': '64',
     } for i in range(2, 6) + range(16, 56)
   ]
 
   return (
       normal_slaves +
       nacl_sdk_slaves +
       layout_slaves +
-      ash_aura_slaves +
+      win7_aura_slaves +
+      win8_aura_slaves +
       drmemory_slaves +
       chromeframe_slave +
       gpu_slaves +
       swarm_slaves +
       perf_slaves +
       swarm_dumb_slaves)
 
 
 slaves = filter(in_service,
                 linux() + mac() + windows() + cros() + android() + ios())