1. @DomName('FileReader.readAsDataURL')
  2. @DocsEditable()
void readAsDataUrl(Blob blob)

Source 

@DomName('FileReader.readAsDataURL')
@DocsEditable()
void readAsDataUrl(Blob blob) =>
    _blink.BlinkFileReader.instance.readAsDataURL_Callback_1_(this, blob);