Include chromium version number in policy templates

grit/format/policy_templates/writers/plist_writer.py

 #!/usr/bin/env 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.
 
 
 from xml.dom import minidom
 from grit.format.policy_templates.writers import plist_helper
 from grit.format.policy_templates.writers import xml_formatted_writer
 
@@ skipping 102 matching lines @@
         self.AddElement(range_list, element_type, {}, str(item['value']))
     elif policy_type in ('list', 'string-enum-list'):
       subkeys = self._AddKeyValuePair(dict, 'pfm_subkeys', 'array')
       subkeys_dict = self.AddElement(subkeys, 'dict')
       subkeys_type = self._AddKeyValuePair(subkeys_dict, 'pfm_type', 'string')
       self.AddText(subkeys_type, 'string')
 
   def BeginTemplate(self):
     self._plist.attributes['version'] = '1'
     dict = self.AddElement(self._plist, 'dict')
-
+    if self._GetChromiumVersionString() is not None:
+      self.AddComment(self._plist, self.config['build'] + ' version: ' + \
+          self._GetChromiumVersionString())
     app_name = plist_helper.GetPlistFriendlyName(self.config['app_name'])
     self._AddStringKeyValuePair(dict, 'pfm_name', app_name)
     self._AddStringKeyValuePair(dict, 'pfm_description', '')
     self._AddStringKeyValuePair(dict, 'pfm_title', '')
     self._AddStringKeyValuePair(dict, 'pfm_version', '1')
     self._AddStringKeyValuePair(dict, 'pfm_domain',
                                 self.config['mac_bundle_id'])
 
     self._array = self._AddKeyValuePair(dict, 'pfm_subkeys', 'array')
 
   def CreatePlistDocument(self):
     dom_impl = minidom.getDOMImplementation('')
     doctype = dom_impl.createDocumentType(
         'plist',
         '-//Apple//DTD PLIST 1.0//EN',
         'http://www.apple.com/DTDs/PropertyList-1.0.dtd')
     return dom_impl.createDocument(None, 'plist', doctype)
 
   def Init(self):
     self._doc = self.CreatePlistDocument()
     self._plist = self._doc.documentElement
 
   def GetTemplateText(self):
     return self.ToPrettyXml(self._doc)