function setUpPage() {
  // Set timeout to 30 minutes.
  goog.testing.TestCase.getActiveTestCase().promiseTimeout = 30 * 60 * 1000;
  capability = lf.Capability.get();
}
An array that holds the results from all benchmarks, such that they can be
extracted later using WebDriver.
@type {!Array<!lf.testing.perf.BenchmarkRunner.Results>}