Make kbps optional when computing effective connection type

net/nqe/network_quality_estimator.cc

Index: net/nqe/network_quality_estimator.cc
diff --git a/net/nqe/network_quality_estimator.cc b/net/nqe/network_quality_estimator.cc
index 6c2fb14b13c5db40fdffdd5c33e771efc045568f..095a044967ad498a3542fa95ec852eddd117b4a7 100644
--- a/net/nqe/network_quality_estimator.cc
+++ b/net/nqe/network_quality_estimator.cc
@@ -1068,12 +1068,13 @@ NetworkQualityEstimator::GetRecentEffectiveConnectionTypeAndNetworkQuality(
   if (effective_connection_type_algorithm_ ==
       EffectiveConnectionTypeAlgorithm::HTTP_RTT_AND_DOWNSTREAM_THROUGHOUT) {
     return GetRecentEffectiveConnectionTypeUsingMetrics(
-        start_time, NetworkQualityEstimator::MetricUsage::
-                        MUST_BE_USED /* http_rtt_metric */,
+        start_time,
+        NetworkQualityEstimator::MetricUsage::
+            MUST_BE_USED /* http_rtt_metric */,
         NetworkQualityEstimator::MetricUsage::
             DO_NOT_USE /* transport_rtt_metric */,
         NetworkQualityEstimator::MetricUsage::
-            MUST_BE_USED /* downstream_throughput_kbps_metric */,
+            USE_IF_AVAILABLE /* downstream_throughput_kbps_metric */,
         http_rtt, transport_rtt, downstream_throughput_kbps);
   }
   if (effective_connection_type_algorithm_ ==