Add mini_installer tests to the Chromium build infrastructure.

masters/master.chromium.fyi/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.
 
 
@@ skipping 756 matching lines @@
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'Win Coverage Tests (5)',
     'hostname': 'vm21-m1',
     'os': 'win',
     'version': 'win7',
     'bits': '64',
   },
+  {
+    'master': 'ChromiumFYI',
+    'builder': 'Chromium Win MiniInstaller Tests',
+    'hostname': 'vm950-m1',
+    'os': 'win',
+    'version': 'win7',
+    'bits': '64',
+  },
 ] + [
   # Deployed for http://crbug.com/166949 but not used yet.
   {
     'master': 'ChromiumFYIUnused',
     'hostname': 'vm889-m1' ,
     'os': 'win',
     'version': 'win7',
     'bits': '64',
   }
 ]