Add IDL parsing of FeaturePolicy extended attribute

third_party/WebKit/Source/build/scripts/make_runtime_features.py

 #!/usr/bin/env python
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 
 
 class RuntimeFeatureWriter(in_generator.Writer):
     class_name = 'RuntimeEnabledFeatures'
 
     # FIXME: valid_values and defaults should probably roll into one object.
     valid_values = {
         'status': ['stable', 'experimental', 'test'],
     }
     defaults = {
+        'condition': None,
+        'custom': False,
+        'depends_on': [],
+        'feature_policy': None,
+        'implied_by': [],
         'origin_trial_feature_name': None,
-        'condition': None,
-        'implied_by': [],
-        'depends_on': [],
-        'custom': False,
+        'settable_from_internals': False,
         'status': None,
-        'settable_from_internals': False,
     }
 
     def __init__(self, in_file_path):
         super(RuntimeFeatureWriter, self).__init__(in_file_path)
         self._outputs = {(self.class_name + '.h'): self.generate_header,
                          (self.class_name + '.cpp'): self.generate_implementation,
                         }
 
         self._features = self.in_file.name_dictionaries
         # Make sure the resulting dictionaries have all the keys we expect.
@@ skipping 26 matching lines @@
     def generate_header(self):
         return self._template_inputs()
 
     @template_expander.use_jinja(class_name + '.cpp.tmpl')
     def generate_implementation(self):
         return self._template_inputs()
 
 
 if __name__ == '__main__':
     in_generator.Maker(RuntimeFeatureWriter).main(sys.argv)