Add support in generate scripts to handle Conditional

Source/build/scripts/make_element_factory.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 22 matching lines @@
 import in_generator
 import template_expander
 import name_utilities
 
 from make_qualified_names import MakeQualifiedNamesWriter
 
 
 class MakeElementFactoryWriter(MakeQualifiedNamesWriter):
     defaults = dict(MakeQualifiedNamesWriter.default_parameters, **{
         'JSInterfaceName': None,
+        'Conditional': None,
         'constructorNeedsCreatedByParser': None,
         'constructorNeedsFormElement': None,
         'contextConditional': None,
         'interfaceName': None,
         'noConstructor': None,
         'noTypeHelpers': None,
         'runtimeEnabled': None,
     })
     default_parameters = dict(MakeQualifiedNamesWriter.default_parameters, **{
         'fallbackInterfaceName': '',
@@ skipping 66 matching lines @@
         if tag['JSInterfaceName']:
             return tag['JSInterfaceName']
         return self._interface(tag)
 
     def _has_js_interface(self, tag):
         return not tag['noConstructor'] and self._js_interface(tag) != ('%sElement' % self.namespace)
 
 
 if __name__ == "__main__":
     in_generator.Maker(MakeElementFactoryWriter).main(sys.argv)