Method timer

flow/Net2.actor.cpp:185–185

	// INetwork interface
	double now() const override { return currentTime; };
	double timer() override { return ::timer(); };
	double timer_monotonic() override { return ::timer_monotonic(); };
	Future<Void> delay(double seconds, TaskPriority taskId) override;
	Future<Void> orderedDelay(double seconds, TaskPriority taskId) override;