Minor refactor of MaybeMigrateOrCloseSessions.

net/quic/quic_stream_factory.h

Index: net/quic/quic_stream_factory.h
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index 9a7cfe5e74e60496e85c1bbb032ed5cdbd0dbf87..b19c83ad98da5c06a0617db8c18be0295dae39d3 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -226,7 +226,13 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
                       IPEndPoint addr,
                       NetworkChangeNotifier::NetworkHandle network);
 
-  // Helper method that initiates migration of active sessions
+  // Finds an alternative to |old_network| from the platform's list of connected
+  // networks. Returns NetworkChangeNotifier::kInvalidNetworkHandle if no
+  // alternative is found.
+  NetworkChangeNotifier::NetworkHandle FindAlternateNetwork(
+      NetworkChangeNotifier::NetworkHandle old_network);
+
+  // Method that initiates migration of active sessions
   // currently bound to |network| to an alternate network, if one
   // exists. Idle sessions bound to |network| are closed. If there is
   // no alternate network to migrate active sessions onto, active
@@ -235,6 +241,16 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
   void MaybeMigrateOrCloseSessions(NetworkChangeNotifier::NetworkHandle network,
                                    bool force_close);
 
+  // Method that initiates early migration of |session| if |session| is
+  // active and if there is an alternate network than the one to which
+  // |session| is currently bound.
+  void MaybeMigrateSessionEarly(QuicChromiumClientSession* session);
+
+  // Method that migrates |session| over to using |new_network|.
+  void MigrateSessionToNetwork(
+      QuicChromiumClientSession* session,
+      NetworkChangeNotifier::NetworkHandle new_network);
+
   // NetworkChangeNotifier::IPAddressObserver methods:
 
   // Until the servers support roaming, close all connections when the local