NQE: Plumb RTT and throughput estimates to the UI thread

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 142 matching lines @@
    private:
     DISALLOW_COPY_AND_ASSIGN(ThroughputObserver);
   };
 
   // Provides simple interface to obtain the effective connection type.
   class NET_EXPORT NetworkQualityProvider {
    public:
     // Returns the current effective connection type.
     virtual EffectiveConnectionType GetEffectiveConnectionType() const = 0;
 
+    virtual ~NetworkQualityProvider() {}
+
     // Adds |observer| to a list of effective connection type observers.
     virtual void AddEffectiveConnectionTypeObserver(
         EffectiveConnectionTypeObserver* observer) = 0;
 
     // Removes |observer| from a list of effective connection type observers.
     virtual void RemoveEffectiveConnectionTypeObserver(
         EffectiveConnectionTypeObserver* observer) = 0;
 
-    virtual ~NetworkQualityProvider() {}
+    // Adds |observer| to the list of RTT and throughput estimate observers.
+    // |observer| would be notified of the current RTT and throughput estimates
+    // in the next message pump.
+    virtual void AddRTTAndThroughputEstimatesObserver(
+        RTTAndThroughputEstimatesObserver* observer) = 0;
+
+    // Removes |observer| from the list of RTT and throughput estimate
+    // observers.
+    virtual void RemoveRTTAndThroughputEstimatesObserver(
+        RTTAndThroughputEstimatesObserver* observer) = 0;
 
    protected:
     NetworkQualityProvider() {}
 
    private:
     DISALLOW_COPY_AND_ASSIGN(NetworkQualityProvider);
   };
 
   // Creates a new NetworkQualityEstimator.
   // |variation_params| is the map containing all field trial parameters
@@ skipping 107 matching lines @@
   // If |disable_offline_check| is set to true, then the device offline check is
   // disabled when computing the effective connection type or when writing the
   // prefs.
   void DisableOfflineCheckForTesting(bool disable_offline_check);
 
   // Reports |effective_connection_type| to all
   // EffectiveConnectionTypeObservers.
   void ReportEffectiveConnectionTypeForTesting(
       EffectiveConnectionType effective_connection_type);
 
+  // Reports the RTTs and throughput to all RTTAndThroughputEstimatesObservers.
+  void ReportRTTsAndThroughputForTesting(base::TimeDelta http_rtt,
+                                         base::TimeDelta transport_rtt,
+                                         int32_t downstream_throughput_kbps);
+
   // Adds and removes |observer| from the list of cache observers.
   void AddNetworkQualitiesCacheObserver(
       nqe::internal::NetworkQualityStore::NetworkQualitiesCacheObserver*
           observer);
   void RemoveNetworkQualitiesCacheObserver(
       nqe::internal::NetworkQualityStore::NetworkQualitiesCacheObserver*
           observer);
 
   // Called when the persistent prefs have been read. |read_prefs| contains the
   // parsed prefs as a map between NetworkIDs and CachedNetworkQualities.
@@ skipping 493 matching lines @@
       disallowed_observation_sources_for_transport_;
 
   base::WeakPtrFactory<NetworkQualityEstimator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkQualityEstimator);
 };
 
 }  // namespace net
 
 #endif  // NET_NQE_NETWORK_QUALITY_ESTIMATOR_H_