[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]