Expand system font values during property parsing.

Source/build/scripts/make_style_builder.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 48 matching lines @@
             set_if_none(property, 'getter', lower_first(name))
             set_if_none(property, 'setter', 'set' + name)
             set_if_none(property, 'initial', 'initial' + name)
             if property['custom_all']:
                 property['custom_initial'] = True
                 property['custom_inherit'] = True
                 property['custom_value'] = True
             property['should_declare_functions'] = not property['use_handlers_for'] and not property['longhands'] \
                                                    and not property['direction_aware'] and not property['builder_skip']
 
-        self._properties['CSSPropertyFont']['should_declare_functions'] = True
-
     @template_expander.use_jinja('StyleBuilderFunctions.h.tmpl',
                                  filters=filters)
     def generate_style_builder_functions_h(self):
         return {
             'properties': self._properties,
         }
 
     @template_expander.use_jinja('StyleBuilderFunctions.cpp.tmpl',
                                  filters=filters)
     def generate_style_builder_functions_cpp(self):
         return {
             'properties': self._properties,
         }
 
     @template_expander.use_jinja('StyleBuilder.cpp.tmpl', filters=filters)
     def generate_style_builder(self):
         return {
             'properties': self._properties,
         }
 
 
 if __name__ == '__main__':
     in_generator.Maker(StyleBuilderWriter).main(sys.argv)