Add WiFi SSID getter to NetworkChangeNotifier.

net/base/network_change_notifier_linux.cc

Index: net/base/network_change_notifier_linux.cc
diff --git a/net/base/network_change_notifier_linux.cc b/net/base/network_change_notifier_linux.cc
index 82daf7fffa0792ffdf82326a3a9233d752f299fc..ed14783b62e06ab089b3bde811eb61e7644becb5 100644
--- a/net/base/network_change_notifier_linux.cc
+++ b/net/base/network_change_notifier_linux.cc
@@ -23,6 +23,10 @@ class NetworkChangeNotifierLinux::Thread : public base::Thread {
     return address_tracker_.GetCurrentConnectionType();
   }
 
+  std::string GetCurrentWiFiSSID() {
+    return address_tracker_.GetCurrentWiFiSSID();
+  }
+
   const internal::AddressTrackerLinux* address_tracker() const {
     return &address_tracker_;
   }
@@ -122,6 +126,10 @@ NetworkChangeNotifierLinux::GetCurrentConnectionType() const {
   return notifier_thread_->GetCurrentConnectionType();
 }
 
+std::string NetworkChangeNotifierLinux::GetCurrentWiFiSSID() const {
+  return notifier_thread_->GetCurrentWiFiSSID();
+}
+
 const internal::AddressTrackerLinux*
 NetworkChangeNotifierLinux::GetAddressTrackerInternal() const {
   return notifier_thread_->address_tracker();