Cascade declared property values instead of applying values on top of each other

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 31 matching lines @@
         'lower_first': lower_first,
     }
 
     valid_values = {
         'svg': [True, False],
         'font': [True, False],
         'custom_all': [True, False],
         'custom_initial': [True, False],
         'custom_inherit': [True, False],
         'custom_value': [True, False],
-        'direction_aware': [True, False],
         'skip': [True, False],
     }
     defaults = {
         'name_for_methods': None,
-        'use_handlers_for': None,
         'svg': False,
         'font': False,
         'converter': None,
-        'direction_aware': False,
         'skip': False,
 # These depend on property name by default
         'type_name': None,
         'getter': None,
         'setter': None,
         'initial': None,
 # Setting these stops default handlers being generated
 # Setting custom_all is the same as setting the other three
         'custom_all': False,
         'custom_initial': False,
@@ skipping 20 matching lines @@
             cc = property['name_for_methods'] or cc.replace('Webkit', '')
             property['camel_case_name'] = cc
             set_if_none(property, 'type_name', 'E' + cc)
             set_if_none(property, 'getter', lower_first(cc))
             set_if_none(property, 'setter', 'set' + cc)
             set_if_none(property, 'initial', 'initial' + cc)
             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['direction_aware'] and not property['skip']
+            property['should_declare_functions'] = not property['skip']
 
         self._properties = dict((property['property_id'], property) for property in self._properties)
 
     @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)