Add optional mandatory policy setting for template generation

grit/format/policy_templates/writers/template_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.
 
 
 class TemplateWriter(object):
   '''Abstract base class for writing policy templates in various formats.
   The methods of this class will be called by PolicyTemplateGenerator.
   '''
@@ skipping 69 matching lines @@
     for supported_on in policy['supported_on']:
       for supported_on_platform in supported_on['platforms']:
         if supported_on_platform in self.platforms:
           return True
     return False
 
   def CanBeRecommended(self, policy):
     '''Checks if the given policy can be recommended.'''
     return policy.get('features', {}).get('can_be_recommended', False)
 
+  def CanBeMandatory(self, policy):
+    '''Checks if the given policy can be mandatory.'''
+    return policy.get('features', {}).get('can_be_mandatory', True)
+
   def IsPolicySupportedOnPlatform(self, policy, platform):
     '''Checks if |policy| is supported on |platform|.
 
     Args:
       policy: The dictionary of the policy.
       platform: The platform to check; one of 'win', 'mac', 'linux' or
         'chrome_os'.
     '''
     is_supported = lambda x: platform in x['platforms']
     return any(filter(is_supported, policy['supported_on']))
@@ skipping 189 matching lines @@
     '''
     is_group = policy['type'] == 'group'
     if is_group:
       # Groups are sorted by caption.
       str_key = policy['caption']
     else:
       # Regular policies are sorted by name.
       str_key = policy['name']
     # Groups come before regular policies.
     return (not is_group, str_key)