Return E_C_T_OFFLINE when the device is offline

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 649 matching lines @@
   // unavailable, add the default estimates.
   if (!ReadCachedNetworkQualityEstimate())
     AddDefaultEstimates();
   estimated_median_network_quality_ = nqe::internal::NetworkQuality();
 }
 
 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();
 
   int32_t kbps = nqe::internal::kInvalidThroughput;
   if (!GetDownlinkThroughputKbpsEstimate(&kbps))
     kbps = nqe::internal::kInvalidThroughput;
 
   if (url_request_rtt == nqe::internal::InvalidRTT() &&
       kbps == nqe::internal::kInvalidThroughput) {
@@ skipping 343 matching lines @@
 
 void NetworkQualityEstimator::NotifyObserversOfThroughput(
     const ThroughputObservation& observation) {
   FOR_EACH_OBSERVER(
       ThroughputObserver, throughput_observer_list_,
       OnThroughputObservation(observation.value, observation.timestamp,
                               observation.source));
 }
 
 }  // namespace net