Drop empty [] for dictionaries and interfaces in IDL files

third_party/WebKit/Source/bindings/scripts/blink_idl_parser.py

 # 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 246 matching lines @@
         # [NotEnumerable] DOMString toString();
         # Limited form of Operation to prevent others from being added.
         # FIXME: Should be a stringifier instead.
         p[0] = self.BuildNamed('ExceptionOperation', p, 2, p[1])
 
     # Extended attributes
     # [b49] Override base parser: remove comment field, since comments stripped
     # FIXME: Upstream
     def p_ExtendedAttributeList(self, p):
         """ExtendedAttributeList : '[' ExtendedAttribute ExtendedAttributes ']'
-                                 | '[' ']'
                                  | """
         if len(p) > 3:
             items = ListFromConcat(p[2], p[3])
             p[0] = self.BuildProduction('ExtAttributes', p, 1, items)
 
     # Error handling for ExtendedAttributeList.
     # We can't upstream this because we override ExtendedAttributeList.
     def p_ExtendedAttributeListError(self, p):
         """ExtendedAttributeList : '[' ExtendedAttribute ',' error"""
         p[0] = self.BuildError(p, "ExtendedAttributeList")
@@ skipping 120 matching lines @@
         return 1
     blink_idl_lexer.main(argv)
     # Important: rewrite_tables=True causes the cache file to be deleted if it
     # exists, thus making sure that PLY doesn't load it instead of regenerating
     # the parse table.
     parser = BlinkIDLParser(outputdir=outputdir, rewrite_tables=True)
 
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))