[NetworkChangeNotifier] Return more specific network connection types (ethernet/wifi) on OSX

net/base/network_change_notifier_mac.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_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_
 #define NET_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_
 
 #include <SystemConfiguration/SystemConfiguration.h>
 
 #include <memory>
@@ skipping 30 matching lines @@
     void OnNetworkConfigChange(CFArrayRef changed_keys) override;
 
    private:
     NetworkChangeNotifierMac* const net_config_watcher_;
     DISALLOW_COPY_AND_ASSIGN(Forwarder);
   };
 
  private:
   class DnsConfigServiceThread;
 
+  // Called on the main thread on startup, afterwards on the notifier thread.
+  static ConnectionType CalculateConnectionType(SCNetworkConnectionFlags flags);
+
   // Methods directly called by the NetworkConfigWatcherMac::Delegate:
   void StartReachabilityNotifications();
   void SetDynamicStoreNotificationKeys(SCDynamicStoreRef store);
   void OnNetworkConfigChange(CFArrayRef changed_keys);
 
   void SetInitialConnectionType();
 
   static void ReachabilityCallback(SCNetworkReachabilityRef target,
                                    SCNetworkConnectionFlags flags,
                                    void* notifier);
@@ skipping 13 matching lines @@
   std::unique_ptr<const NetworkConfigWatcherMac> config_watcher_;
 
   std::unique_ptr<DnsConfigServiceThread> dns_config_service_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifierMac);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_NETWORK_CHANGE_NOTIFIER_MAC_H_