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

net/android/network_library.h

 // 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.
 
 #ifndef NET_ANDROID_NETWORK_LIBRARY_H_
 #define NET_ANDROID_NETWORK_LIBRARY_H_
 
 #include <jni.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 53 matching lines @@
 NET_EXPORT std::string GetTelephonyNetworkOperator();
 
 // Returns MCC+MNC (mobile country code + mobile network code) as
 // the numeric name of the current SIM operator.
 NET_EXPORT std::string GetTelephonySimOperator();
 
 // Returns true if the device is roaming on the currently active network. When
 // true, it suggests that use of data may incur extra costs.
 NET_EXPORT bool GetIsRoaming();
 
+// Returns true if the system's captive portal probe was blocked for the current
+// default data network. The method will return false if the captive portal
+// probe was not blocked, the login process to the captive portal has been
+// successfully completed, or if the captive portal status can't be determined.
+// Requires ACCESS_NETWORK_STATE permission. Only available on Android
+// Marshmallow and later versions. Returns false on earlier versions.
+NET_EXPORT bool GetIsCaptivePortal();
+
 // Gets the SSID of the currently associated WiFi access point if there is one.
 // Otherwise, returns empty string.
 NET_EXPORT_PRIVATE std::string GetWifiSSID();
 
 }  // namespace android
 }  // namespace net
 
 #endif  // NET_ANDROID_NETWORK_LIBRARY_H_