message: Use target_os="fuchsia"
  Cr-Commit-Position: refs/heads/main@{#38030}
diff: 'gn_args': 'rtc_use_dummy_audio_file_devices=true',
  },
  'fuchsia': {
  - 'gn_args': 'is_fuchsia=true'
  + 'gn_args': 'target_os="fuchsia"'
  },
  'full_symbols': {
  'gn_args': 'symbol_level=2',
  