(cherry picked from commit 228696bf80)
228696bf80
New methods: TimeTrackerSmall(Milliseconds expiry); void Update(Milliseconds diff); void Reset(Milliseconds expiry) Milliseconds GetExpiry() const Removed methods: int32 GetExpiry() const Also add basic unit tests. Core/Scripts: Use std::chrono interface of TimeTrackerSmall (cherry picked from commit e55516348d)
e55516348d