Record NQE ECT at main frame

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 758 matching lines @@
     transport_rtt_percentile->Add(transport_rtt.InMilliseconds());
   }
 
   int32_t kbps;
   if (GetDownlinkThroughputKbpsEstimate(&kbps)) {
     // Add the 50th percentile value.
     base::HistogramBase* throughput_percentile = GetHistogram(
         "MainFrame.Kbps.Percentile50.", current_network_id_.type, 1000 * 1000);
     throughput_percentile->Add(kbps);
   }
+
+  const EffectiveConnectionType effective_connection_type =
+      GetEffectiveConnectionType();
+  base::HistogramBase* effective_connection_type_histogram =
+      base::Histogram::FactoryGet(
+          std::string("NQE.MainFrame.EffectiveConnectionType.") +
+              GetNameForConnectionType(current_network_id_.type),
+          0, EFFECTIVE_CONNECTION_TYPE_LAST,
+          EFFECTIVE_CONNECTION_TYPE_LAST /* Number of buckets */,
+          base::HistogramBase::kUmaTargetedHistogramFlag);
+
+  effective_connection_type_histogram->Add(effective_connection_type);
 }
 
 NetworkQualityEstimator::EffectiveConnectionType
 NetworkQualityEstimator::GetEffectiveConnectionType() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return GetRecentEffectiveConnectionType(base::TimeTicks());
 }
 
 NetworkQualityEstimator::EffectiveConnectionType
 NetworkQualityEstimator::GetRecentEffectiveConnectionType(
@@ skipping 450 matching lines @@
     NotifyObserversOfEffectiveConnectionTypeChanged() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // TODO(tbansal): Add hysteresis in the notification.
   FOR_EACH_OBSERVER(
       EffectiveConnectionTypeObserver, effective_connection_type_observer_list_,
       OnEffectiveConnectionTypeChanged(effective_connection_type_));
 }
 
 }  // namespace net