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

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index 3bf68b42d8a993a01a4a684dcf20ba926628bfdc..1d152280598c290c8c3921ce0debeb18b80f8f22 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -125,6 +125,7 @@ HttpNetworkSession::Params::Params()
       quic_close_sessions_on_ip_change(false),
       quic_idle_connection_timeout_seconds(kIdleConnectionTimeoutSeconds),
       quic_disable_preconnect_if_0rtt(false),
+      quic_migrate_sessions_on_network_change(false),
       proxy_delegate(NULL) {
   quic_supported_versions.push_back(QUIC_VERSION_25);
 }
@@ -176,6 +177,7 @@ HttpNetworkSession::HttpNetworkSession(const Params& params)
           params.quic_store_server_configs_in_properties,
           params.quic_close_sessions_on_ip_change,
           params.quic_idle_connection_timeout_seconds,
+          params.quic_migrate_sessions_on_network_change,
           params.quic_connection_options),
       spdy_session_pool_(params.host_resolver,
                          params.ssl_config_service,
@@ -319,7 +321,7 @@ void HttpNetworkSession::CloseAllConnections() {
   normal_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED);
   websocket_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED);
   spdy_session_pool_.CloseCurrentSessions(ERR_ABORTED);
-  quic_stream_factory_.CloseAllSessions(ERR_ABORTED);
+  quic_stream_factory_.CloseAllSessions(ERR_ABORTED, QUIC_INTERNAL_ERROR);
 }
 
 void HttpNetworkSession::CloseIdleConnections() {