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

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index 26ffd09927b22bbcc16ae26f859f8e8b832838d9..eb69590e9df10633db68c3feb294a3bcfb699086 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -173,6 +173,9 @@ class NET_EXPORT HttpNetworkSession
     // If true, all QUIC sessions are closed when IP address of primary
     // interface changes.
     bool quic_close_sessions_on_ip_change;
+    // If true, active QUIC sessions may be migrated onto new IPs on network 
+    // changes.
+    bool quic_migrate_sessions_on_net_change;
     ProxyDelegate* proxy_delegate;
   };