Expose API to detect when captive portal probe was blocked on Android

net/android/network_change_notifier_android.cc

 // Copyright (c) 2012 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.
 
 ////////////////////////////////////////////////////////////////////////////////
 // Threading considerations:
 //
 // This class is designed to meet various threading guarantees starting from the
 // ones imposed by NetworkChangeNotifier:
 // - The notifier can be constructed on any thread.
@@ skipping 177 matching lines @@
 NetworkChangeNotifierAndroid::GetCurrentNetworkConnectionType(
     NetworkHandle network) const {
   return delegate_->GetNetworkConnectionType(network);
 }
 
 NetworkChangeNotifier::NetworkHandle
 NetworkChangeNotifierAndroid::GetCurrentDefaultNetwork() const {
   return delegate_->GetCurrentDefaultNetwork();
 }
 
+bool NetworkChangeNotifierAndroid::GetCurrentNetworkCaptivePortal() const {
+  return delegate_->GetCurrentNetworkCaptivePortal();
+}
+
 void NetworkChangeNotifierAndroid::OnConnectionTypeChanged() {
   DnsConfigServiceThread::NotifyNetworkChangeNotifierObservers();
 }
 
 void NetworkChangeNotifierAndroid::OnMaxBandwidthChanged(
     double max_bandwidth_mbps,
     ConnectionType type) {
   NetworkChangeNotifier::NotifyObserversOfMaxBandwidthChange(max_bandwidth_mbps,
                                                              type);
 }
@@ skipping 67 matching lines @@
       NetworkChangeNotifier::GetConnectionType();
   NetworkChangeNotifier::LogOperatorCodeHistogram(type);
   if (NetworkChangeNotifier::IsConnectionCellular(type)) {
     UMA_HISTOGRAM_ENUMERATION("NCN.CellularConnectionSubtype",
                               delegate_->GetCurrentConnectionSubtype(),
                               SUBTYPE_LAST + 1);
   }
 }
 
 }  // namespace net