Remove EventListener attributes from Dart DOM API.

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 107 matching lines @@
       ]
 
   # Import WebKit IDLs.
   idl_list_file = open(idl_list_file_name, 'r')
   for file_name in idl_list_file:
     file_name = file_name.strip()
     idl_file_name = os.path.join(os.path.dirname(idl_list_file_name), file_name)
     builder.import_idl_file(idl_file_name, webkit_options)
   idl_list_file.close()
 
-  webkit_supplemental_options = databasebuilder.DatabaseBuilderOptions(
-    idl_syntax=idlparser.FREMONTCUT_SYNTAX,
-    source='WebKit',
-    rename_operation_arguments_on_merge=True)
-  builder.import_idl_file(
-      os.path.join(current_dir, '..', 'idl', 'dart', 'webkit-supplemental.idl'),
-      webkit_supplemental_options)
-
   # Import Dart idl:
   dart_options = databasebuilder.DatabaseBuilderOptions(
     idl_syntax=idlparser.FREMONTCUT_SYNTAX,
     source='Dart',
     rename_operation_arguments_on_merge=True)
 
   builder.import_idl_file(
       os.path.join(current_dir, '..', 'idl', 'dart', 'dart.idl'),
       dart_options)
 
@@ skipping 57 matching lines @@
   for dir_name in webkit_dirs:
     dir_path = os.path.join(webcore_dir, dir_name)
     os.path.walk(dir_path, visitor, None)
 
   os.close(idl_list_file)
 
   return build_database(idl_list_file_name)
 
 if __name__ == '__main__':
   sys.exit(main())