new_contents: #!/usr/bin/env python
  # Copyright (c) 2018 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.
  
  """Generates a command-line for coverage.py. Useful for manual coverage runs.
  
  Before running the generated command line, do this:
  
  gn gen out/coverage --args='use_clang_coverage=true is_component_build=false'
  """
  
  import sys
  
  TESTS = [
    'video_capture_tests',
    'webrtc_nonparallel_tests',
    'video_engine_tests',
    'tools_unittests',
    'test_support_unittests',
    'system_wrappers_unittests',
    'rtc_unittests',
    'rtc_stats_unittests',
    'rtc_pc_unittests',
    'rtc_media_unittests',
    'peerconnection_unittests',
    'ortc_unittests',
    'modules_unittests',
    'modules_tests',
    'low_bandwidth_audio_test',
    'common_video_unittests',
    'common_audio_unittests',
    'audio_decoder_unittests'
  ]
  
  def main():
    cmd = ([sys.executable, 'tools/code_coverage/coverage.py'] + TESTS +
           ['-b out/coverage', '-o out/report'] +
           ['-i=\'.*/out/.*|.*/third_party/.*\''] +
           ['-c \'out/coverage/%s\'' % t for t in TESTS])
  
    def WithXvfb(binary):
      return '-c \'%s testing/xvfb.py %s\'' % (sys.executable, binary)
    modules_unittests = 'out/coverage/modules_unittests'
    cmd[cmd.index('-c \'%s\'' % modules_unittests)] = WithXvfb(modules_unittests)
  
    print ' '.join(cmd)
    return 0
  
  if __name__ == '__main__':
    sys.exit(main())
  
subject: Add script for generating coverage.py commands.