DEPS: Cleanup extra_gyp_flag and extra_gitignore.py

webrtc/build/extra_gitignore.py

-#!/usr/bin/env python
-# Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS.  All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-""" Adds extra patterns to the root .gitignore file.
-
-Reads the contents of the filename given as the first argument and appends
-them to the root .gitignore file. The new entires are intended to be additional
-ignoring patterns, or negating patterns to override existing entries (man
-gitignore for more details).
-"""
-
-import os
-import sys
-
-MODIFY_STRING = '# The following added by %s\n'
-
-
-def main(argv):
-  if not argv[1]:
-    # Special case; do nothing.
-    return 0
-
-  modify_string = MODIFY_STRING % argv[0]
-  gitignore_file = os.path.dirname(argv[0]) + '/../../.gitignore'
-  lines = open(gitignore_file, 'r').readlines()
-  for i, line in enumerate(lines):
-    # Look for modify_string in the file to ensure we don't append the extra
-    # patterns more than once.
-    if line == modify_string:
-      lines = lines[:i]
-      break
-  lines.append(modify_string)
-
-  f = open(gitignore_file, 'w')
-  f.write(''.join(lines))
-  f.write(open(argv[1], 'r').read())
-  f.close()
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv))