static registerParserByMime(mimeType, parserFactory) {
    shaka.media.ManifestParser.parsersByMime.set(mimeType, parserFactory);
  }
Registers a manifest parser by MIME type.

@param {string} mimeType The MIME type of the manifest.
@param {shaka.extern.ManifestParser.Factory} parserFactory The factory
  used to create parser instances.
@export