Add optional mandatory policy setting for template generation

grit/format/policy_templates/writers/adm_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 grit.format.policy_templates.writers import template_writer
 
 
 NEWLINE = '\r\n'
@@ skipping 135 matching lines @@
       builder.AddLine('VALUENAME "%s"' % policy['name'])
       builder.AddLine('VALUEON NUMERIC 1')
       builder.AddLine('VALUEOFF NUMERIC 0')
     else:
       self._WritePart(policy, key_name, builder)
 
     builder.AddLine('END POLICY', -1)
     builder.AddLine()
 
   def WritePolicy(self, policy):
-    self._WritePolicy(policy,
-                      self.config['win_reg_mandatory_key_name'],
-                      self.policies)
+    if self.CanBeMandatory(policy):
+      self._WritePolicy(policy,
+                        self.config['win_reg_mandatory_key_name'],
+                        self.policies)
 
   def WriteRecommendedPolicy(self, policy):
     self._WritePolicy(policy,
                       self.config['win_reg_recommended_key_name'],
                       self.recommended_policies)
 
   def BeginPolicyGroup(self, group):
     category_name = group['name'] + '_Category'
     self._AddGuiString(category_name, group['caption'])
     self.policies.AddLine('CATEGORY !!' + category_name, 1)
@@ skipping 79 matching lines @@
     self.strings = IndentedStringBuilder()
     # Map of strings seen, to avoid duplicates.
     self.strings_seen = {}
     # String buffer for building the policies of the ADM file.
     self.policies = IndentedStringBuilder()
     # String buffer for building the recommended policies of the ADM file.
     self.recommended_policies = IndentedStringBuilder()
 
   def GetTemplateText(self):
     return self.lines.ToString()