code: function getBrowserCapabilities(browsers) {
    for (var i = 0; i < browsers.length; i++) {
      var b = browsers[i];
      b['tunnel-identifier'] = process.env.TRAVIS_JOB_NUMBER;
      b['build'] = process.env.TRAVIS_BUILD_NUMBER;
      b['name'] = getJobName(b);
    }
    return browsers;
  }
docs: Adds 'name', 'build', and 'tunnel-identifier' properties to all elements,
  based on runtime information from the environment.
  @param {!Array<!Object>} browsers
  @return {!Array<!Object>} The original array, whose objects are augmented.