NQE: Record the number of RTT and throughput samples received

net/nqe/network_quality_estimator.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_
 #define NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 362 matching lines @@
   // and |downstream_throughput_kbps| are set to the expected HTTP RTT,
   // transport RTT and downstream throughput (in kilobits per second) based on
   // observations taken since |start_time|. Virtualized for testing.
   virtual EffectiveConnectionType
   GetRecentEffectiveConnectionTypeAndNetworkQuality(
       const base::TimeTicks& start_time,
       base::TimeDelta* http_rtt,
       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);
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest, StoreObservations);
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest, TestAddObservation);
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest,
                            DefaultObservationsOverridden);
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest,
                            ObtainAlgorithmToUseFromParams);
   FRIEND_TEST_ALL_PREFIXES(NetworkQualityEstimatorTest, HalfLifeParam);
@@ skipping 65 matching lines @@
   void RecordNetworkIDAvailability() const;
 
   // Records UMA on main frame requests.
   void RecordMetricsOnMainFrameRequest() const;
 
   // Records a downstream throughput observation to the observation buffer if
   // a valid observation is available. |downstream_kbps| is the downstream
   // 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)
   // is provided by the field trial.
   void ObtainOperatingParams(
       const std::map<std::string, std::string>& variation_params);
 
   // Adds the default median RTT and downstream throughput estimate for the
   // current connection type to the observation buffer.
   void AddDefaultEstimates();
@@ skipping 285 matching lines @@
   nqe::internal::EventCreator event_creator_;
 
   base::WeakPtrFactory<NetworkQualityEstimator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkQualityEstimator);
 };
 
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_