Migrates QUIC sessions to a new network when old network is (about to be) disconnected.

net/base/network_change_notifier.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_H_
 #define NET_BASE_NETWORK_CHANGE_NOTIFIER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 83 matching lines @@
     SUBTYPE_WIFI_G,
     SUBTYPE_WIFI_N,
     SUBTYPE_WIFI_AC,
     SUBTYPE_WIFI_AD,
     SUBTYPE_UNKNOWN,
     SUBTYPE_NONE,
     SUBTYPE_OTHER,
     SUBTYPE_LAST = SUBTYPE_OTHER
   };
 
+  // Types of network changes specified to
+  // NotifyObserversOfSpecificNetworkChange.
+  enum NetworkChangeType {
+    CONNECTED,
+    DISCONNECTED,
+    SOON_TO_DISCONNECT,
+    MADE_DEFAULT
+  };
+
   class NET_EXPORT IPAddressObserver {
    public:
     // Will be called when the IP address of the primary interface changes.
     // This includes when the primary interface itself changes.
     virtual void OnIPAddressChanged() = 0;
 
    protected:
     IPAddressObserver() {}
     virtual ~IPAddressObserver() {}
 
@@ skipping 268 matching lines @@
   static void RemoveDNSObserver(DNSObserver* observer);
   static void RemoveNetworkChangeObserver(NetworkChangeObserver* observer);
   static void RemoveMaxBandwidthObserver(MaxBandwidthObserver* observer);
   static void RemoveNetworkObserver(NetworkObserver* observer);
 
   // Allow unit tests to trigger notifications.
   static void NotifyObserversOfIPAddressChangeForTests();
   static void NotifyObserversOfConnectionTypeChangeForTests(
       ConnectionType type);
   static void NotifyObserversOfNetworkChangeForTests(ConnectionType type);
+  static void NotifyObserversOfSpecificNetworkChangeForTests(
+      NetworkChangeType type,
+      NetworkHandle network);
   static void NotifyObserversOfInitialDNSConfigReadForTests();
   static void NotifyObserversOfMaxBandwidthChangeForTests(
       double max_bandwidth_mbps,
       ConnectionType type);
 
   // Enable or disable notifications from the host. After setting to true, be
   // sure to pump the RunLoop until idle to finish any preexisting
   // notifications. To use this, it must must be called before a
   // NetworkChangeNotifier is created.
   static void SetTestNotificationsOnly(bool test_only);
@@ skipping 31 matching lines @@
    public:
     DisableForTest();
     ~DisableForTest();
 
    private:
     // The original NetworkChangeNotifier to be restored on destruction.
     NetworkChangeNotifier* network_change_notifier_;
   };
 
  protected:
-  // Types of network changes specified to
-  // NotifyObserversOfSpecificNetworkChange.
-  enum NetworkChangeType {
-    CONNECTED,
-    DISCONNECTED,
-    SOON_TO_DISCONNECT,
-    MADE_DEFAULT
-  };
-
   // NetworkChanged signal is calculated from the IPAddressChanged and
   // ConnectionTypeChanged signals. Delay parameters control how long to delay
   // producing NetworkChanged signal after particular input signals so as to
   // combine duplicates.  In other words if an input signal is repeated within
   // the corresponding delay period, only one resulting NetworkChange signal is
   // produced.
   struct NET_EXPORT NetworkChangeCalculatorParams {
     NetworkChangeCalculatorParams();
     // Controls delay after OnIPAddressChanged when transitioning from an
     // offline state.
@@ skipping 96 matching lines @@
 
   // Set true to disable non-test notifications (to prevent flakes in tests).
   static bool test_notifications_only_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkChangeNotifier);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_NETWORK_CHANGE_NOTIFIER_H_