Add optional mandatory policy setting for template generation

grit/format/policy_templates/writers/admx_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 xml_formatted_writer
 
 
 def GetWriter(config):
@@ skipping 277 matching lines @@
       self._AddEnumPolicy(parent, policy)
     elif policy_type in ('list', 'string-enum-list'):
       parent = self._GetElements(policy_elem)
       self._AddListPolicy(parent, key, policy_name)
     elif policy_type == 'group':
       pass
     else:
       raise Exception('Unknown policy type %s.' % policy_type)
 
   def WritePolicy(self, policy):
-    self._WritePolicy(policy,
-                      policy['name'],
-                      self.config['win_reg_mandatory_key_name'],
-                      self._active_mandatory_policy_group_name)
+    if self.CanBeMandatory(policy):
+      self._WritePolicy(policy,
+                        policy['name'],
+                        self.config['win_reg_mandatory_key_name'],
+                        self._active_mandatory_policy_group_name)
 
   def WriteRecommendedPolicy(self, policy):
     self._WritePolicy(policy,
                       policy['name'] + '_recommended',
                       self.config['win_reg_recommended_key_name'],
                       self._active_recommended_policy_group_name)
 
   def _BeginPolicyGroup(self, group, name, parent):
     '''Generates ADMX elements for a Policy-Group.
     '''
@@ skipping 54 matching lines @@
     self._AddCategories(self.config['win_recommended_category_path'])
     self._active_policies_elem = self.AddElement(policy_definitions_elem,
                                                  'policies')
     self._active_mandatory_policy_group_name = \
         self.config['win_mandatory_category_path'][-1]
     self._active_recommended_policy_group_name = \
         self.config['win_recommended_category_path'][-1]
 
   def GetTemplateText(self):
     return self.ToPrettyXml(self._doc)