message: Add require calls for MslException and MslError.
diff: @@ -85,6 +85,9 @@ if (isCommonJS) exports.xparameterize = xparameterize;
  * @param {number} messageId expected MSL message ID.
  */
  jasmine.Matchers.prototype.toThrow = function(expected, messageId) {
  + const MslException = require('../../../../../../core/src/main/javascript/MslException.js');
  + const MslError = require('../../../../../../core/src/main/javascript/MslError.js');
  +
  var result = false;
  var exception;
  if (typeof this.actual != 'function') {
  @@ -135,6 +138,7 @@ jasmine.Matchers.prototype.toThrow = function(expected, messageId) {
  return result;
  };
  +
  /**
  * Override matcher function to include stack trace.
  *
  