Add support in generate scripts to handle Conditional

Source/build/scripts/make_names.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 @@
         return entry['Symbol']
     # FIXME: Remove this special case for the ugly x-webkit-foo attributes.
     if entry['name'].startswith('-webkit-'):
         return entry['name'].replace('-', '_')[1:]
     return name_utilities.cpp_name(entry).replace('-', '_')
 
 
 class MakeNamesWriter(in_generator.Writer):
     defaults = {
         'Conditional': None,  # FIXME: Add support for Conditional.
+        'ImplementedAs': None,
         'RuntimeEnabled': None,  # What should we do for runtime-enabled features?
-        'ImplementedAs': None,
         'Symbol': None,
     }
     default_parameters = {
+        'export': '',
         'namespace': '',
         'suffix': '',
-        'export': '',
     }
     filters = {
         'cpp_name': name_utilities.cpp_name,
+        'enable_conditional': name_utilities.enable_conditional_if_endif,
         'hash': hasher.hash,
         'script_name': name_utilities.script_name,
         'symbol': _symbol,
         'to_macro_style': name_utilities.to_macro_style,
     }
 
     def __init__(self, in_file_path):
         super(MakeNamesWriter, self).__init__(in_file_path)
 
         namespace = self.in_file.parameters['namespace'].strip('"')
@@ skipping 17 matching lines @@
     def generate_header(self):
         return self._template_context
 
     @template_expander.use_jinja("MakeNames.cpp.tmpl", filters=filters)
     def generate_implementation(self):
         return self._template_context
 
 
 if __name__ == "__main__":
     in_generator.Maker(MakeNamesWriter).main(sys.argv)