Switch to the new go generator in the mojo tree.

mojo/public/tools/bindings/run_code_generators.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 #
 # This script accepts the output of the mojom parser and uses that
 # data to invoke the code generators.
 
 import argparse
 import imp
@@ skipping 14 matching lines @@
   parser.add_argument('filenames', nargs='*',
                       help='Filter on the set of .mojom files for which code '
                       'will be generated.')
   parser.add_argument('-f', '--file-graph', dest='file_graph',
                       help='Location of the parser output. "-" for stdin. '
                       '(default "-")', default='-')
   parser.add_argument("-o", "--output-dir", dest="output_dir", default=".",
                       help="output directory for generated files")
   parser.add_argument("-g", "--generators", dest="generators_string",
                       metavar="GENERATORS",
-                      default="c++,dart,go,javascript,java,python",
+                      default="c++,dart,javascript,java,python",
                       help="comma-separated list of generators")
   parser.add_argument("-s", "--src-root-path", dest="src_root_path",
                       default=".",
                       help="relative path to the root of the source tree.")
   parser.add_argument("--no-gen-imports", action="store_true",
                       help="Generate code only for the files that are "
                       "specified on the command line. By default, code "
                       "is generated for all specified files and their "
                       "transitive imports.")
   parser.add_argument("--generate-type-info", dest="generate_type_info",
@@ skipping 130 matching lines @@
         filtered_args = [arg for arg in remaining_args
                          if arg.startswith(prefix)]
       if args.generate_type_info:
         filtered_args.append("--generate_type_info")
 
       generator.GenerateFiles(filtered_args)
 
 
 if __name__ == "__main__":
   sys.exit(main())