Add NetworkQualityEstimator (NQE) UMA when ECT is computed

net/nqe/network_quality_estimator_unittest.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 <stddef.h>
 #include <stdint.h>
 
 #include <limits>
@@ skipping 210 matching lines @@
       EffectiveConnectionType::EFFECTIVE_CONNECTION_TYPE_UNKNOWN, 1);
   histogram_tester.ExpectUniqueSample(
       "NQE.MainFrame.EffectiveConnectionType.Unknown",
       EffectiveConnectionType::EFFECTIVE_CONNECTION_TYPE_UNKNOWN, 1);
   histogram_tester.ExpectUniqueSample("NQE.EstimateAvailable.MainFrame.RTT", 0,
                                       1);
   histogram_tester.ExpectUniqueSample(
       "NQE.EstimateAvailable.MainFrame.TransportRTT", 0, 1);
   histogram_tester.ExpectUniqueSample("NQE.EstimateAvailable.MainFrame.Kbps", 0,
                                       1);
+  EXPECT_LE(1u,
+            histogram_tester.GetAllSamples("NQE.RTT.OnECTComputation").size());
+  EXPECT_LE(1u,
+            histogram_tester.GetAllSamples("NQE.Kbps.OnECTComputation").size());
 
   std::unique_ptr<URLRequest> request2(context.CreateRequest(
       estimator.GetEchoURL(), DEFAULT_PRIORITY, &test_delegate));
   request2->SetLoadFlags(request2->load_flags() | LOAD_MAIN_FRAME_DEPRECATED);
   request2->Start();
   base::RunLoop().Run();
   histogram_tester.ExpectTotalCount("NQE.MainFrame.EffectiveConnectionType", 2);
   histogram_tester.ExpectTotalCount(
       "NQE.MainFrame.EffectiveConnectionType.Unknown", 2);
   histogram_tester.ExpectBucketCount("NQE.EstimateAvailable.MainFrame.RTT", 1,
@@ skipping 1570 matching lines @@
                                       EFFECTIVE_CONNECTION_TYPE_2G, 1);
   histogram_tester.ExpectUniqueSample(
       "NQE.MainFrame.EffectiveConnectionType.WiFi",
       EFFECTIVE_CONNECTION_TYPE_2G, 1);
   histogram_tester.ExpectUniqueSample("NQE.EstimateAvailable.MainFrame.RTT", 0,
                                       1);
   histogram_tester.ExpectUniqueSample(
       "NQE.EstimateAvailable.MainFrame.TransportRTT", 0, 1);
   histogram_tester.ExpectUniqueSample("NQE.EstimateAvailable.MainFrame.Kbps", 0,
                                       1);
+  EXPECT_LE(1u,
+            histogram_tester
+                .GetAllSamples("NQE.EffectiveConnectionType.OnECTComputation")
+                .size());
 
   size_t expected_effective_connection_type_notifications = 1;
   EXPECT_EQ(expected_effective_connection_type_notifications,
             observer.effective_connection_types().size());
 
   EXPECT_EQ(expected_effective_connection_type_notifications,
             estimator.rtt_observations_.Size());
 
   // Increase the number of RTT observations. Every time the number of RTT
   // observations is more than doubled, effective connection type must be
@@ skipping 203 matching lines @@
 
   histogram_tester.ExpectTotalCount(
       "NQE.MainFrame.TransportRTT.Percentile50.Unknown", num_requests);
   histogram_tester.ExpectTotalCount("NQE.MainFrame.EffectiveConnectionType",
                                     num_requests);
   histogram_tester.ExpectTotalCount(
       "NQE.MainFrame.EffectiveConnectionType.Unknown", num_requests);
   histogram_tester.ExpectBucketCount(
       "NQE.MainFrame.EffectiveConnectionType.Unknown",
       EFFECTIVE_CONNECTION_TYPE_UNKNOWN, 1);
+  EXPECT_LE(1u,
+            histogram_tester
+                .GetAllSamples("NQE.EffectiveConnectionType.OnECTComputation")
+                .size());
+  EXPECT_LE(1u,
+            histogram_tester.GetAllSamples("NQE.TransportRTT.OnECTComputation")
+                .size());
+  EXPECT_LE(1u,
+            histogram_tester.GetAllSamples("NQE.RTT.OnECTComputation").size());
 }
 
 #if defined(OS_IOS)
 // Flaky on iOS when |accuracy_recording_delay| is non-zero.
 #define MAYBE_RecordAccuracy DISABLED_RecordAccuracy
 #else
 #define MAYBE_RecordAccuracy RecordAccuracy
 #endif
 // Tests if the NQE accuracy metrics are recorded properly.
 TEST(NetworkQualityEstimatorTest, MAYBE_RecordAccuracy) {
@@ skipping 703 matching lines @@
 
   // Cleanup.
   estimator.RemoveRTTObserver(&rtt_observer);
   estimator.RemoveThroughputObserver(&throughput_observer);
   estimator.RemoveRTTAndThroughputEstimatesObserver(&rtt_throughput_observer);
   estimator.RemoveEffectiveConnectionTypeObserver(
       &effective_connection_type_observer);
 }
 
 }  // namespace net