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

chrome/browser/io_thread_unittest.cc

Index: chrome/browser/io_thread_unittest.cc
diff --git a/chrome/browser/io_thread_unittest.cc b/chrome/browser/io_thread_unittest.cc
index 899ee24a064cefbe8efb197f8b751e45d6ada98d..93955e5596a7b680475f08d7e39e8d0241c0a0f2 100644
--- a/chrome/browser/io_thread_unittest.cc
+++ b/chrome/browser/io_thread_unittest.cc
@@ -173,6 +173,7 @@ TEST_F(IOThreadTest, EnableQuicFromFieldTrialGroup) {
   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());
 }
 
@@ -290,6 +291,16 @@ TEST_F(IOThreadTest,
   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";