Refactor of QUIC's rtt storage and calculation to have a single RttStats

net/quic/congestion_control/loss_detection_interface.h

Index: net/quic/congestion_control/loss_detection_interface.h
diff --git a/net/quic/congestion_control/loss_detection_interface.h b/net/quic/congestion_control/loss_detection_interface.h
index bb1f86decbe80b946c2ebe142391bd6865a25a09..21cc4f7fbc6478434203416e31bafb5dbf49afa4 100644
--- a/net/quic/congestion_control/loss_detection_interface.h
+++ b/net/quic/congestion_control/loss_detection_interface.h
@@ -14,6 +14,7 @@
 namespace net {
 
 class QuicUnackedPacketMap;
+class RttStats;
 
 class NET_EXPORT_PRIVATE LossDetectionInterface {
  public:
@@ -27,8 +28,7 @@ class NET_EXPORT_PRIVATE LossDetectionInterface {
       const QuicUnackedPacketMap& unacked_packets,
       const QuicTime& time,
       QuicPacketSequenceNumber largest_observed,
-      QuicTime::Delta srtt,
-      QuicTime::Delta latest_rtt) = 0;
+      const RttStats& rtt_stats) = 0;
 
   // Get the time the LossDetectionAlgorithm wants to re-evaluate losses.
   // Returns QuicTime::Zero if no alarm needs to be set.