$ google-chrome-stable --headless --single-process --disable-gpu --disable-dev-shm-usage --dump-dom https://domains.google.com/checkip
[1224/005541.808998:WARNING:audio_manager_linux.cc(60)] Falling back to ALSA for audio output. PulseAudio is not available or could not be initialized.
[1224/005541.811767:WARNING:bluez_dbus_manager.cc(247)] Floss manager not present, cannot set Floss enable/disable.
<html><head></head><body>35.229.216.43</body></html>
--disable-audio-outputで警告を抑制できます
$ google-chrome-stable --headless --single-process --disable-gpu --disable-dev-shm-usage --disable-audio-output --dump-dom https://domains.google.com/checkip
[1224/005555.058735:WARNING:bluez_dbus_manager.cc(247)] Floss manager not present, cannot set Floss enable/disable.
<html><head></head><body>35.229.216.43</body></html>
参考