Add windows installer bot.

masters/master.client.dart/master.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.
 
 # It has one job: define a dictionary named BuildmasterConfig. This
 # dictionary has a variety of keys to control different aspects of the
 # buildmaster. They are documented in docs/config.xhtml .
@@ skipping 452 matching lines @@
       'env': windows_env,
     },
   ]
 
   variants_editor_installer = [
     {
       'name': 'dart-editor-installer-mac' + postfix,
       'category': category('4dart-editor'),
       'platform': 'posix' + postfix,
     },
+    {
+      'name': 'dart-editor-installer-win' + postfix,
+      'category': category('4dart-editor'),
+      'platform': 'windows-wix' + postfix,
+    },
+
   ]
 
   variants_arm = [
     {
       'name': 'target-arm-vm-linux-release' + postfix,
       'category': category('1vm-arm'),
       'platform': 'posix-standalone-noRunhooks' + postfix,
       'mode': 'release',
       'arch': 'arm',
       'env': linux_env,
@@ skipping 332 matching lines @@
 c['projectName'] = ActiveMaster.project_name
 c['projectURL'] = config.Master.project_url
 
 # the 'buildbotURL' string should point to the location where the buildbot's
 # internal web server (usually the html.Waterfall page) is visible. This
 # typically uses the port number set in the Waterfall 'status' entry, but
 # with an externally-visible host name which the buildbot cannot figure out
 # without some help.
 
 c['buildbotURL'] = 'http://build.chromium.org/p/client.dart/'