Add code generation for ExperimentalFeatures class from RuntimeEnabledFeatures.

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 28 matching lines @@
     class_name = 'RuntimeEnabledFeatures'
     filters = {
         'enable_conditional': name_utilities.enable_conditional_if_endif,
     }
 
     # FIXME: valid_values and defaults should probably roll into one object.
     valid_values = {
         'status': ['stable', 'experimental', 'test'],
     }
     defaults = {
+        'api_name': None,
         'condition': None,
         'implied_by': [],
         'depends_on': [],
         'custom': False,
         'status': None,
     }
 
     def __init__(self, in_file_path):
         super(RuntimeFeatureWriter, self).__init__(in_file_path)
         self._outputs = {(self.class_name + '.h'): self.generate_header,
@@ skipping 31 matching lines @@
     def generate_header(self):
         return self._template_inputs()
 
     @template_expander.use_jinja(class_name + '.cpp.tmpl', filters=filters)
     def generate_implementation(self):
         return self._template_inputs()
 
 
 if __name__ == '__main__':
     in_generator.Maker(RuntimeFeatureWriter).main(sys.argv)