Add NetworkQualityEstimator (NQE) UMA when ECT is computed

net/nqe/network_quality_estimator.cc

 // 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.
 
 #include "net/nqe/network_quality_estimator.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <utility>
@@ skipping 1015 matching lines @@
   int32_t downstream_throughput_kbps = nqe::internal::kInvalidThroughput;
 
   effective_connection_type_ =
       GetRecentEffectiveConnectionTypeAndNetworkQuality(
           base::TimeTicks(), &http_rtt, &transport_rtt,
           &downstream_throughput_kbps);
 
   network_quality_ = nqe::internal::NetworkQuality(http_rtt, transport_rtt,
                                                    downstream_throughput_kbps);
 
+  UMA_HISTOGRAM_ENUMERATION("NQE.EffectiveConnectionType.OnECTComputation",
+                            effective_connection_type_,
+                            EFFECTIVE_CONNECTION_TYPE_LAST);
+  if (network_quality_.http_rtt() != nqe::internal::InvalidRTT()) {
+    UMA_HISTOGRAM_TIMES("NQE.RTT.OnECTComputation",
+                        network_quality_.http_rtt());
+  }
+
+  if (network_quality_.transport_rtt() != nqe::internal::InvalidRTT()) {
+    UMA_HISTOGRAM_TIMES("NQE.TransportRTT.OnECTComputation",
+                        network_quality_.transport_rtt());
+  }
+
+  if (network_quality_.downstream_throughput_kbps() !=
+      nqe::internal::INVALID_RTT_THROUGHPUT) {
+    UMA_HISTOGRAM_COUNTS_1M("NQE.Kbps.OnECTComputation",
+                            network_quality_.downstream_throughput_kbps());
+  }
+
   NotifyObserversOfRTTOrThroughputComputed();
 
   if (past_type != effective_connection_type_)
     NotifyObserversOfEffectiveConnectionTypeChanged();
 
   event_creator_.MaybeAddEffectiveConnectionTypeChangedEventToNetLog(
       effective_connection_type_, network_quality_);
 
   rtt_observations_size_at_last_ect_computation_ = rtt_observations_.Size();
   throughput_observations_size_at_last_ect_computation_ =
@@ skipping 668 matching lines @@
         NETWORK_QUALITY_OBSERVATION_SOURCE_HTTP_CACHED_ESTIMATE);
     downstream_throughput_kbps_observations_.AddObservation(
         throughput_observation);
     NotifyObserversOfThroughput(throughput_observation);
   }
 
   ComputeEffectiveConnectionType();
 }
 
 }  // namespace net