function testRowId_Empty() {
  if (!capability.webSql) {
    return goog.Promise.resolve();
  }

  return lf.schema.create('foo' + goog.now(), 1).connect({
    storeType: lf.schema.DataStoreType.WEB_SQL
  }).then(function(db) {
    assertEquals(1, lf.Row.getNextId());
  });
}
Tests scanRowId() for the case where all tables are empty.
@return {!IThenable}