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 309ebe8c55a47a6f45a8eeac962fdab861ec841e..8c679299860777ac75ff2b747ce49f1388accfaf 100644
--- a/net/nqe/network_quality_estimator.cc
+++ b/net/nqe/network_quality_estimator.cc
@@ -667,6 +667,11 @@ 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();