1. DomName('AudioContext.createMediaElementSource')
  2. DocsEditable()
MediaElementAudioSourceNode createMediaElementSource(MediaElement mediaElement)

Source 

@DomName('AudioContext.createMediaElementSource')
@DocsEditable()
MediaElementAudioSourceNode createMediaElementSource(MediaElement mediaElement) => wrap_jso(_blink.BlinkAudioContext.instance.createMediaElementSource_Callback_1_(unwrap_jso(this), unwrap_jso(mediaElement)));