message: Increase time window for comparison of "now" to deal with times truncated to the second right across the second boundary.
diff: @@ -123,7 +123,7 @@ describe("MessageHeader", function() {
  function isAboutNowSeconds(seconds) {
  var now = Date.now();
  var time = seconds * MILLISECONDS_PER_SECOND;
  - return (now - 1000 <= time && time <= now + 1000);
  + return (now - 2000 <= time && time <= now + 2000);
  }
  /** MSL trusted network context. */
  