message: util: Use std::chrono for time getters
diff: @@ -90,6 +90,14 @@ template std::chrono::seconds GetTime();
  template std::chrono::milliseconds GetTime();
  template std::chrono::microseconds GetTime();
  +template <typename T>
  +static T GetSystemTime()
  +{
  + const auto now = std::chrono::duration_cast<T>(std::chrono::system_clock::now().time_since_epoch());
  + assert(now.count() > 0);
  + return now;
  +}
  +
  void SetMockTime(int64_t nMockTimeIn)
  {
  Assert(nMockTimeIn >= 0);
  @@ -108,23 +116,17 @@ std::chrono::seconds GetMockTime()
  int64_t GetTimeMillis()
  {
  - int64_t now = (boost::posix_time::microsec_clock::universal_time() -
  - boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_milliseconds();
  - assert(now > 0);
  - return now;
  + return int64_t{GetSystemTime<std::chrono::milliseconds>().count()};
  }
  int64_t GetTimeMicros()
  {
  - int64_t now = (boost::posix_time::microsec_clock::universal_time() -
  - boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_microseconds();
  - assert(now > 0);
  - return now;
  + return int64_t{GetSystemTime<std::chrono::microseconds>().count()};
  }
  int64_t GetSystemTimeInSeconds()
  {
  - return GetTimeMicros()/1000000;
  + return int64_t{GetSystemTime<std::chrono::seconds>().count()};
  }
  std::string FormatISO8601DateTime(int64_t nTime) {
  