Total_(values), 30 + 0.1 * 20, 1e-7);
  });

  /**
   * Returns a model spec where the browser process has two worker threads.
   *
   * This is a function instead of just a variable because the test functions
   * are meant to modify this modelSpec and insert suitable expectations.
   *
   * Thread 1 looks like
   *
   * |0    |10   |20   |30   |40   |50   |60   |70  .... Time
   * [     ]     [     ]     [     ]     [     ]    .... Slices
   *
   * where each slice has a duration of 10ms and CPU time of 5