Update from https://crrev.com/314320

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 f77025a33d8904750a0d3e227c59f7086305c09b..82daf7fffa0792ffdf82326a3a9233d752f299fc 100644
--- a/net/base/network_change_notifier_linux.cc
+++ b/net/base/network_change_notifier_linux.cc
@@ -33,9 +33,12 @@ class NetworkChangeNotifierLinux::Thread : public base::Thread {
   void CleanUp() override;
 
  private:
+  void OnIPAddressChanged();
+  void OnLinkChanged();
   scoped_ptr<DnsConfigService> dns_config_service_;
   // Used to detect online/offline state and IP address changes.
   internal::AddressTrackerLinux address_tracker_;
+  NetworkChangeNotifier::ConnectionType last_type_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
@@ -43,11 +46,12 @@ class NetworkChangeNotifierLinux::Thread : public base::Thread {
 NetworkChangeNotifierLinux::Thread::Thread()
     : base::Thread("NetworkChangeNotifier"),
       address_tracker_(
-          base::Bind(&NetworkChangeNotifier::
-                     NotifyObserversOfIPAddressChange),
-          base::Bind(&NetworkChangeNotifier::
-                     NotifyObserversOfConnectionTypeChange),
-          base::Bind(base::DoNothing)) {
+          base::Bind(&NetworkChangeNotifierLinux::Thread::OnIPAddressChanged,
+                     base::Unretained(this)),
+          base::Bind(&NetworkChangeNotifierLinux::Thread::OnLinkChanged,
+                     base::Unretained(this)),
+          base::Bind(base::DoNothing)),
+      last_type_(NetworkChangeNotifier::CONNECTION_NONE) {
 }
 
 NetworkChangeNotifierLinux::Thread::~Thread() {
@@ -65,6 +69,20 @@ void NetworkChangeNotifierLinux::Thread::CleanUp() {
   dns_config_service_.reset();
 }
 
+void NetworkChangeNotifierLinux::Thread::OnIPAddressChanged() {
+  NetworkChangeNotifier::NotifyObserversOfIPAddressChange();
+  // When the IP address of a network interface is added/deleted, the
+  // connection type may have changed.
+  OnLinkChanged();
+}
+
+void NetworkChangeNotifierLinux::Thread::OnLinkChanged() {
+  if (last_type_ != GetCurrentConnectionType()) {
+    NetworkChangeNotifier::NotifyObserversOfConnectionTypeChange();
+    last_type_ = GetCurrentConnectionType();
+  }
+}
+
 NetworkChangeNotifierLinux* NetworkChangeNotifierLinux::Create() {
   return new NetworkChangeNotifierLinux();
 }