Include chromium version number in policy templates

grit/format/policy_templates/writers/reg_writer_unittest.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.
 
 
 '''Unit tests for grit.format.policy_templates.writers.reg_writer'''
 
 
 import os
@@ skipping 30 matching lines @@
     grd = self.PrepareTest(
         '{'
         '  "policy_definitions": [],'
         '  "placeholders": [],'
         '  "messages": {}'
         '}')
     output = self.GetOutput(grd, 'fr', {'_chromium': '1', }, 'reg', 'en')
     expected_output = 'Windows Registry Editor Version 5.00'
     self.CompareOutputs(output, expected_output)
 
+  def testEmptyVersion(self):
+    # Test the handling of an empty policy list.
+    grd = self.PrepareTest(
+        '{'
+        '  "policy_definitions": [],'
+        '  "placeholders": [],'
+        '  "messages": {}'
+        '}')
+    output = self.GetOutput(
+        grd, 'fr', {'_chromium': '1', 'version': '39.0.0.0' }, 'reg', 'en')
+    expected_output = ('Windows Registry Editor Version 5.00\r\n'
+                       '; chromium version: 39.0.0.0\r\n')
+    self.CompareOutputs(output, expected_output)
+
   def testMainPolicy(self):
     # Tests a policy group with a single policy of type 'main'.
     grd = self.PrepareTest(
         '{'
         '  "policy_definitions": ['
         '    {'
         '      "name": "MainPolicy",'
         '      "type": "main",'
         '      "features": { "can_be_recommended": True },'
         '      "caption": "",'
@@ skipping 308 matching lines @@
         '"Policy2"="c"',
         '',
         '[HKEY_LOCAL_MACHINE\\Software\\Policies\\Chromium\\Policy1]',
         '"1"="a"',
         '"2"="b"'])
     self.CompareOutputs(output, expected_output)
 
 
 if __name__ == '__main__':
   unittest.main()