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

Source 

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