Remove redundant "type=str" in Mojo bindings generator.

mojo/public/tools/bindings/mojom_bindings_generator.py

 #!/usr/bin/env python
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """The frontend for the Mojo bindings system."""
 
 
 import argparse
 import imp
@@ skipping 270 matching lines @@
       default=[],
       help="add a directory to be searched for import files. The depth from "
            "source root can be specified for each import by appending it after "
            "a colon")
   generate_parser.add_argument("--typemap", action="append", metavar="TYPEMAP",
                                default=[], dest="typemaps",
                                help="apply TYPEMAP to generated output")
   generate_parser.add_argument("--variant", dest="variant", default=None,
                                help="output a named variant of the bindings")
   generate_parser.add_argument(
-      "--bytecode_path", type=str, required=True, help=(
+      "--bytecode_path", required=True, help=(
           "the path from which to load template bytecode; to generate template "
           "bytecode, run %s precompile BYTECODE_PATH" % os.path.basename(
               sys.argv[0])))
   generate_parser.add_argument("--for_blink", action="store_true",
                                help="Use WTF types as generated types for mojo "
                                "string/array/map.")
   generate_parser.add_argument(
       "--use_once_callback", action="store_true",
       help="Use base::OnceCallback instead of base::RepeatingCallback.")
   generate_parser.add_argument(
       "--use_new_js_bindings", action="store_true",
       help="Use the new module loading approach and the core API exposed by "
       "Web IDL. This option only affects the JavaScript bindings.")
   generate_parser.add_argument(
-      "--export_attribute", type=str, default="",
+      "--export_attribute", default="",
       help="Optional attribute to specify on class declaration to export it "
       "for the component build.")
   generate_parser.add_argument(
-      "--export_header", type=str, default="",
+      "--export_header", default="",
       help="Optional header to include in the generated headers to support the "
       "component build.")
   generate_parser.add_argument(
       "--generate_non_variant_code", action="store_true",
       help="Generate code that is shared by different variants.")
   generate_parser.add_argument(
-      "--depfile", type=str,
+      "--depfile",
       help="A file into which the list of input files will be written.")
   generate_parser.add_argument(
-      "--depfile_target", type=str,
+      "--depfile_target",
       help="The target name to use in the depfile.")
   generate_parser.set_defaults(func=_Generate)
 
   precompile_parser = subparsers.add_parser("precompile",
       description="Precompile templates for the mojom bindings generator.")
   precompile_parser.add_argument(
       "-o", "--output_dir", dest="output_dir", default=".",
       help="output directory for precompiled templates")
   precompile_parser.set_defaults(func=_Precompile)
 
   args, remaining_args = parser.parse_known_args()
   return args.func(args, remaining_args)
 
 
 if __name__ == "__main__":
   sys.exit(main())