NQE: Record the number of RTT and throughput samples received

net/nqe/network_quality_estimator.h

Index: net/nqe/network_quality_estimator.h
diff --git a/net/nqe/network_quality_estimator.h b/net/nqe/network_quality_estimator.h
index 111248bb048d8a68551945dbf5830865d827d53e..21db66fc7189cb2fc86d171124eefba2922a2346 100644
--- a/net/nqe/network_quality_estimator.h
+++ b/net/nqe/network_quality_estimator.h
@@ -380,6 +380,11 @@ class NET_EXPORT NetworkQualityEstimator
       base::TimeDelta* transport_rtt,
       int32_t* downstream_throughput_kbps) const;
 
+  // Notifies |this| of a new transport layer RTT. Called by socket watchers.
+  // Protected for testing.
+  void OnUpdatedRTTAvailable(SocketPerformanceWatcherFactory::Protocol protocol,
+                             const base::TimeDelta& rtt);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest,
                            AdaptiveRecomputationEffectiveConnectionType);
@@ -467,10 +472,6 @@ class NET_EXPORT NetworkQualityEstimator
   // throughput in kilobits per second.
   void OnNewThroughputObservationAvailable(int32_t downstream_kbps);
 
-  // Notifies |this| of a new transport layer RTT.
-  void OnUpdatedRTTAvailable(SocketPerformanceWatcherFactory::Protocol protocol,
-                             const base::TimeDelta& rtt);
-
   // Obtains the model parameters for different effective connection types from
   // the field trial parameters. For each effective connection type, a model
   // (currently composed of a RTT threshold and a downlink throughput threshold)