static registerParserByExtension(extension, parserFactory) {
    shaka.Deprecate.deprecateFeature(5,
        'ManifestParser.registerParserByExtension',
        'Please use an ManifestParser with registerParserByMime function.');
  }
Registers a manifest parser by file extension.

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