Return E_C_T_OFFLINE when the device is offline

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 3e03a8e4e4987cfc52f72d8629f721914c559be0..a9596d04815ee479e0534f05a0510866e4a809f9 100644
--- a/net/nqe/network_quality_estimator.cc
+++ b/net/nqe/network_quality_estimator.cc
@@ -692,6 +692,11 @@ NetworkQualityEstimator::EffectiveConnectionType
 NetworkQualityEstimator::GetEffectiveConnectionType() const {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  // If the device is currently offline, then return
+  // EFFECTIVE_CONNECTION_TYPE_OFFLINE.
+  if (GetCurrentNetworkID().type == NetworkChangeNotifier::CONNECTION_NONE)
+    return EFFECTIVE_CONNECTION_TYPE_OFFLINE;
+
   base::TimeDelta url_request_rtt = nqe::internal::InvalidRTT();
   if (!GetURLRequestRTTEstimate(&url_request_rtt))
     url_request_rtt = nqe::internal::InvalidRTT();