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

chrome/browser/io_thread_unittest.cc

 // Copyright 2014 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.
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/test/mock_entropy_provider.h"
 #include "chrome/browser/io_thread.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
@@ skipping 155 matching lines @@
   EXPECT_EQ(0.25f, params.quic_load_server_info_timeout_srtt_multiplier);
   EXPECT_FALSE(params.quic_enable_connection_racing);
   EXPECT_FALSE(params.quic_enable_non_blocking_io);
   EXPECT_FALSE(params.quic_disable_disk_cache);
   EXPECT_FALSE(params.quic_prefer_aes);
   EXPECT_FALSE(params.use_alternative_services);
   EXPECT_EQ(4, params.quic_max_number_of_lossy_connections);
   EXPECT_EQ(0.5f, params.quic_packet_loss_threshold);
   EXPECT_FALSE(params.quic_delay_tcp_race);
   EXPECT_FALSE(params.quic_close_sessions_on_ip_change);
+  EXPECT_FALSE(params.quic_migrate_sessions_on_net_change);
   EXPECT_FALSE(IOThread::ShouldEnableQuicForDataReductionProxy());
 }
 
 TEST_F(IOThreadTest, EnableQuicFromQuicProxyFieldTrialGroup) {
   const struct {
     std::string field_trial_group_name;
     bool expect_enable_quic;
   } tests[] = {
       {
           std::string(), false,
@@ skipping 97 matching lines @@
 TEST_F(IOThreadTest,
        QuicCloseSessionsOnIpChangeFromFieldTrialParams) {
   field_trial_group_ = "Enabled";
   field_trial_params_["close_sessions_on_ip_change"] = "true";
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
   EXPECT_TRUE(params.quic_close_sessions_on_ip_change);
 }
 
+TEST_F(IOThreadTest,
+       QuicMigrateSessionsOnNetChangeFromFieldTrialParams) {
+  field_trial_group_ = "Enabled";
+  field_trial_params_["migrate_sessions_on_net_change"] = "true";
+  ConfigureQuicGlobals();
+  net::HttpNetworkSession::Params params;
+  InitializeNetworkSessionParams(&params);
+  EXPECT_TRUE(params.quic_migrate_sessions_on_net_change);
+}
+
 TEST_F(IOThreadTest, PacketLengthFromFieldTrialParams) {
   field_trial_group_ = "Enabled";
   field_trial_params_["max_packet_length"] = "1450";
 
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
   EXPECT_EQ(1450u, params.quic_max_packet_length);
 }
 
@@ skipping 211 matching lines @@
   command_line_.AppendSwitch(switches::kEnableQuic);
   is_quic_allowed_by_policy_ = false;
   ConfigureQuicGlobals();
 
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
   EXPECT_FALSE(params.enable_quic);
 }
 
 }  // namespace test