Make the fuchsia mojo/public repo the source of truth.

mojo/public/tools/gn/last_commit_timestamp.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.
-
-"""Outputs the timestamp of the last commit in a Git repository."""
-
-import argparse
-import subprocess
-import sys
-
-def get_timestamp(directory):
-  return subprocess.check_output(["git", "log", "-1", "--pretty=format:%ct"],
-                                  cwd=directory)
-
-def main():
-  parser = argparse.ArgumentParser(description="Prints the timestamp of the "
-                                   "last commit in a git repository")
-  parser.add_argument("--directory", nargs='?',
-                      help="Directory of the git repository", default=".")
-  parser.add_argument("--output", nargs='?',
-                      help="Output file, or stdout if omitted")
-  args = parser.parse_args()
-
-  output_file = sys.stdout
-  if args.output:
-    output_file = open(args.output, 'w')
-
-  with output_file:
-    # Print without newline so GN can read it.
-    output_file.write(get_timestamp(args.directory))
-
-if __name__ == '__main__':
-  sys.exit(main())
-