Add mandatory policy setting for template generation

components/policy/resources/policy_templates.json

Index: components/policy/resources/policy_templates.json
diff --git a/components/policy/resources/policy_templates.json b/components/policy/resources/policy_templates.json
index c919b4f73dcc51cab0e4b668dafc94e6b5f51c9d..84333b4cd97be880f50621902ba2f8a96e7e9c85 100644
--- a/components/policy/resources/policy_templates.json
+++ b/components/policy/resources/policy_templates.json
@@ -100,6 +100,9 @@
 #   documentation should state that the policy supports dynamic refresh or not.
 #   Supporting dynamic refresh means that Chrome respects the changes to the
 #   policy immediately, without the need for restart.
+#   'can_be_mandatory' can be set to False to exclude that policy in the
+#   mandatory policies template. This only affects the template generation;
+#   The default is True.
 #   'can_be_recommended' can be set to True to include that policy in the
 #   recommended policies templates. This only affects the template generation;
 #   all policies can be at the recommended level. The default is False.
@@ -2743,6 +2746,7 @@
             'dynamic_refresh': False,
             'per_profile': True,
             'can_be_recommended': True,
+            'can_be_mandatory' : False,
           },
           'example_value': [{'protocol': 'mailto', 'url': 'https://mail.google.com/mail/?extsrc=mailto&url=%s', 'default': 'true'}],
           'id': 268,
@@ -6786,6 +6790,10 @@
       'desc': '''The name of the feature that indicates for a given policy that it can be recommended, instead of mandatory''',
       'text': '''Can Be Recommended'''
     },
+    'doc_feature_can_be_mandatory': {
+      'desc': '''The name of the feature that indicates for a given policy that it can be mandatory, instead of recommended''',
+      'text': '''Can Be Mandatory'''
+    },
     'doc_feature_per_profile': {
       'desc': '''The name of the feature that indicates whether a policy is applicable to browser Profiles individually or whether it affects the entire browser.''',
       'text': '''Per Profile'''