text: ##include "platform.h"
  
  namespace v8 {
  namespace base {
  
  class PosixTimezoneCache : public TimezoneCache {
   public:
    double DaylightSavingsOffset(double time_ms) override;
    void Clear(TimeZoneDetection) override {}
    ~PosixTimezoneCache() override = default;
  
   protected:
    static const int msPerSecond = 1000;
  };
  
  }  // namespace base
  }  // namespace v8
  