Parsing expectations for run-webkit-tests takes >20 seconds.

Tools/Scripts/webkitpy/w3c/test_importer.py

 # Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1. Redistributions of source code must retain the above
 #    copyright notice, this list of conditions and the following
 #    disclaimer.
 # 2. Redistributions in binary form must reproduce the above
@@ skipping 278 matching lines @@
                     'reftests': reftests, 'jstests': jstests, 'total_tests': total_tests})
 
     def find_paths_to_skip(self):
         if self.options.ignore_expectations:
             return set()
 
         paths_to_skip = set()
         port = self.host.port_factory.get()
         w3c_import_expectations_path = self.webkit_finder.path_from_webkit_base('LayoutTests', 'W3CImportExpectations')
         w3c_import_expectations = self.filesystem.read_text_file(w3c_import_expectations_path)
-        parser = TestExpectationParser(port, full_test_list=(), is_lint_mode=False)
+        parser = TestExpectationParser(port, all_tests=(), is_lint_mode=False)
         expectation_lines = parser.parse(w3c_import_expectations_path, w3c_import_expectations)
         for line in expectation_lines:
             if 'SKIP' in line.expectations:
                 if line.specifiers:
                     _log.warning("W3CImportExpectations:%s should not have any specifiers" % line.line_numbers)
                     continue
                 paths_to_skip.add(line.name)
         return paths_to_skip
 
     def import_tests(self):
@@ skipping 97 matching lines @@
         """ Creates a destination directory that mirrors that of the source directory """
 
         new_subpath = self.dir_to_import[len(self.top_of_repo):]
 
         destination_directory = os.path.join(self.destination_directory, new_subpath)
 
         if not os.path.exists(destination_directory):
             os.makedirs(destination_directory)
 
         _log.info('Tests will be imported into: %s', destination_directory)