Revert of QUIC - Disable QUIC when there is bad packet loss rate (50% of the

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 152 matching lines @@
             params.quic_supported_versions);
   EXPECT_EQ(net::QuicTagVector(), params.quic_connection_options);
   EXPECT_FALSE(params.quic_always_require_handshake_confirmation);
   EXPECT_FALSE(params.quic_disable_connection_pooling);
   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_EQ(0, params.quic_max_number_of_lossy_connections);
+  EXPECT_EQ(1.0f, params.quic_packet_loss_threshold);
   EXPECT_FALSE(IOThread::ShouldEnableQuicForDataReductionProxy());
 }
 
 TEST_F(IOThreadTest, EnableQuicFromQuicProxyFieldTrialGroup) {
   base::FieldTrialList field_trial_list(new base::MockEntropyProvider());
   base::FieldTrialList::CreateFieldTrial(
       data_reduction_proxy::params::GetQuicFieldTrialName(), "Enabled");
 
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
@@ skipping 192 matching lines @@
   field_trial_group_ = "Enabled";
   field_trial_params_["max_number_of_lossy_connections"] = "5";
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
   EXPECT_EQ(5, params.quic_max_number_of_lossy_connections);
 }
 
 TEST_F(IOThreadTest, QuicPacketLossThresholdFieldTrialParams) {
   field_trial_group_ = "Enabled";
-  field_trial_params_["packet_loss_threshold"] = "0.6";
+  field_trial_params_["packet_loss_threshold"] = "0.5";
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
-  EXPECT_EQ(0.6f, params.quic_packet_loss_threshold);
+  EXPECT_EQ(0.5f, params.quic_packet_loss_threshold);
 }
 
 TEST_F(IOThreadTest, QuicReceiveBufferSize) {
   field_trial_group_ = "Enabled";
   field_trial_params_["receive_buffer_size"] = "2097152";
   ConfigureQuicGlobals();
   net::HttpNetworkSession::Params params;
   InitializeNetworkSessionParams(&params);
   EXPECT_EQ(2097152, params.quic_socket_receive_buffer_size);
 }
@@ skipping 43 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