Bug 1016757 - Add TimeDuration::operator* (const uint64_t) const, i.e. accept an unsigned 64-bit integer as a multiplier; r=froydnj
Bug 1007513 - Make AnimationEvent.elapsedTime report the actual time the animation has been running; r=dholbert

This patch implements the behavior proposed in:

  http://lists.w3.org/Archives/Public/www-style/2014May/0356.html