Implement an event-based simulator for QuicConnection

net/quic/core/congestion_control/simulation/alarm_factory.h

Index: net/quic/core/congestion_control/simulation/alarm_factory.h
diff --git a/net/quic/core/congestion_control/simulation/alarm_factory.h b/net/quic/core/congestion_control/simulation/alarm_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..674e60d295353e53e885ab502ed9b041962e125a
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+++ b/net/quic/core/congestion_control/simulation/alarm_factory.h
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+#ifndef NET_QUIC_CORE_CONGESTION_CONTROL_SIMULATION_ALARM_FACTORY_H_
+#define NET_QUIC_CORE_CONGESTION_CONTROL_SIMULATION_ALARM_FACTORY_H_
+
+#include "net/quic/core/congestion_control/simulation/actor.h"
+#include "net/quic/core/quic_alarm_factory.h"
+
+namespace net {
+namespace simulation {
+
+// AlarmFactory allows to schedule QuicAlarms using the simulation event queue.
+class AlarmFactory : public QuicAlarmFactory {
+ public:
+  AlarmFactory(Simulator* simulator, std::std::string name);
+  ~AlarmFactory() override;
+
+  QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override;
+  QuicArenaScopedPtr<QuicAlarm> CreateAlarm(
+      QuicArenaScopedPtr<QuicAlarm::Delegate> delegate,
+      QuicConnectionArena* arena) override;
+
+ private:
+  // Automatically generate a name for a new alarm.
+  std::std::string GetNewAlarmName();
+
+  Simulator* simulator_;
+  std::std::string name_;
+  int counter_;
+
+  DISALLOW_COPY_AND_ASSIGN(AlarmFactory);
+};
+
+}  // namespace simulation
+}  // namespace net
+
+#endif  // NET_QUIC_CORE_CONGESTION_CONTROL_SIMULATION_ALARM_FACTORY_H_