Support proper propagation of enabled per context and at runtime attributes.

lib/dom/scripts/fremontcutbuilder.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 import database
 import databasebuilder
 import idlparser
 import logging.config
 import os.path
@@ skipping 129 matching lines @@
     source='Dart',
     rename_operation_arguments_on_merge=True)
 
   builder.import_idl_file(
       os.path.join(current_dir, '..', 'idl', 'dart', 'dart.idl'),
       dart_options)
 
   # Merging:
   builder.merge_imported_interfaces(optional_argument_whitelist)
 
+  builder.fetch_constructor_data(webkit_options)
   builder.fix_displacements('WebKit')
 
   # Cleanup:
   builder.normalize_annotations(['WebKit', 'Dart'])
 
   db.Save()
 
 def main():
   current_dir = os.path.dirname(__file__)
 
@@ skipping 44 matching lines @@
 
   for dir_name in webkit_dirs:
     dir_path = os.path.join(webcore_dir, dir_name)
     os.path.walk(dir_path, visitor, None)
 
   database_dir = os.path.join(current_dir, '..', 'database')
   return build_database(idl_files, database_dir)
 
 if __name__ == '__main__':
   sys.exit(main())