[mediastreamaudiosourcenode-routing.html]
  expected:
    if (os == "mac") and debug: [OK, TIMEOUT]
    if (os == "mac") and not debug: [OK, TIMEOUT]
  [MediaStreamAudioSourceNode captures the right track.]
    expected:
      if (os == "mac") and debug: [PASS, TIMEOUT]
      if (os == "mac") and not debug: [PASS, TIMEOUT]
