Record how frequently EEP provides valid estimates

net/base/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/base/network_quality_estimator.h"
 
 #include <float.h>
 #include <algorithm>
 #include <cmath>
 #include <limits>
@@ skipping 1071 matching lines @@
     // updates estimates are available, OnUpdatedEstimateAvailable() will be
     // called.
     external_estimate_provider_->Update();
     return;
   }
 
   RecordExternalEstimateProviderMetrics(
       EXTERNAL_ESTIMATE_PROVIDER_STATUS_QUERY_SUCCESSFUL);
   base::TimeDelta rtt;
   if (external_estimate_provider_->GetRTT(&rtt)) {
+    RecordExternalEstimateProviderMetrics(
+        EXTERNAL_ESTIMATE_PROVIDER_STATUS_RTT_AVAILABLE);
+    UMA_HISTOGRAM_TIMES("NQE.ExternalEstimateProvider.RTT", rtt);
     rtt_observations_.AddObservation(
         RttObservation(rtt, base::TimeTicks::Now(), EXTERNAL_ESTIMATE));
   }
 
   int32_t downstream_throughput_kbps;
   if (external_estimate_provider_->GetDownstreamThroughputKbps(
           &downstream_throughput_kbps)) {
+    RecordExternalEstimateProviderMetrics(
+        EXTERNAL_ESTIMATE_PROVIDER_STATUS_DOWNLINK_BANDWIDTH_AVAILABLE);
+    UMA_HISTOGRAM_COUNTS("NQE.ExternalEstimateProvider.DownlinkBandwidth",
+                         downstream_throughput_kbps);
     downstream_throughput_kbps_observations_.AddObservation(
         ThroughputObservation(downstream_throughput_kbps,
                               base::TimeTicks::Now(), EXTERNAL_ESTIMATE));
   }
 }
 
 void NetworkQualityEstimator::CacheNetworkQualityEstimate() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK_LE(cached_network_qualities_.size(),
             static_cast<size_t>(kMaximumNetworkQualityCacheSize));
@@ skipping 105 matching lines @@
 
 NetworkQualityEstimator::NetworkQuality&
     NetworkQualityEstimator::NetworkQuality::
     operator=(const NetworkQuality& other) {
   rtt_ = other.rtt_;
   downstream_throughput_kbps_ = other.downstream_throughput_kbps_;
   return *this;
 }
 
 }  // namespace net