Remove the unused "Disable non-blocking IO" QUIC experiment code.

net/quic/chromium/quic_stream_factory_test.cc

 // Copyright (c) 2012 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 "net/quic/chromium/quic_stream_factory.h"
 
 #include <memory>
 #include <ostream>
 #include <utility>
 
@@ skipping 173 matching lines @@
             new ChannelIDService(new DefaultChannelIDStore(nullptr))),
         cert_transparency_verifier_(new MultiLogCTVerifier()),
         scoped_mock_network_change_notifier_(nullptr),
         factory_(nullptr),
         host_port_pair_(kDefaultServerHostName, kDefaultServerPort),
         url_(kDefaultUrl),
         url2_(kServer2Url),
         url3_(kServer3Url),
         url4_(kServer4Url),
         privacy_mode_(PRIVACY_MODE_DISABLED),
-        enable_non_blocking_io_(true),
         store_server_configs_in_properties_(false),
         close_sessions_on_ip_change_(false),
         idle_connection_timeout_seconds_(kIdleConnectionTimeoutSeconds),
         reduced_ping_timeout_seconds_(kPingTimeoutSecs),
         packet_reader_yield_after_duration_milliseconds_(
             kQuicYieldAfterDurationMilliseconds),
         migrate_sessions_on_network_change_(false),
         migrate_sessions_early_(false),
         allow_server_migration_(false),
         force_hol_blocking_(false),
         race_cert_verification_(false),
         estimate_initial_rtt_(false) {
     clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
   }
 
   void Initialize() {
     DCHECK(!factory_);
     factory_.reset(new QuicStreamFactory(
         net_log_.net_log(), &host_resolver_, ssl_config_service_.get(),
         &socket_factory_, &http_server_properties_, &test_proxy_delegate_,
         cert_verifier_.get(), &ct_policy_enforcer_, channel_id_service_.get(),
         &transport_security_state_, cert_transparency_verifier_.get(),
         /*SocketPerformanceWatcherFactory*/ nullptr,
         &crypto_client_stream_factory_, &random_generator_, &clock_,
         kDefaultMaxPacketSize, string(), SupportedVersions(version_),
-        enable_non_blocking_io_, store_server_configs_in_properties_,
-        close_sessions_on_ip_change_,
+        store_server_configs_in_properties_, close_sessions_on_ip_change_,
         /*mark_quic_broken_when_network_blackholes*/ false,
         idle_connection_timeout_seconds_, reduced_ping_timeout_seconds_,
         packet_reader_yield_after_duration_milliseconds_,
         migrate_sessions_on_network_change_, migrate_sessions_early_,
         allow_server_migration_, force_hol_blocking_, race_cert_verification_,
         /*do_not_fragment*/ true, estimate_initial_rtt_, QuicTagVector(),
         /*enable_token_binding*/ false));
     factory_->set_require_confirmation(false);
   }
 
@@ skipping 498 matching lines @@
   GURL url_;
   GURL url2_;
   GURL url3_;
   GURL url4_;
 
   PrivacyMode privacy_mode_;
   NetLogWithSource net_log_;
   TestCompletionCallback callback_;
 
   // Variables to configure QuicStreamFactory.
-  bool enable_non_blocking_io_;
   bool store_server_configs_in_properties_;
   bool close_sessions_on_ip_change_;
   int idle_connection_timeout_seconds_;
   int reduced_ping_timeout_seconds_;
   int packet_reader_yield_after_duration_milliseconds_;
   bool migrate_sessions_on_network_change_;
   bool migrate_sessions_early_;
   bool allow_server_migration_;
   bool force_hol_blocking_;
   bool race_cert_verification_;
@@ skipping 4462 matching lines @@
   // Clear all cached states.
   factory_->ClearCachedStatesInCryptoConfig(
       base::Callback<bool(const GURL&)>());
   EXPECT_TRUE(test_cases[0].state->certs().empty());
   EXPECT_TRUE(test_cases[1].state->certs().empty());
   EXPECT_TRUE(test_cases[2].state->certs().empty());
 }
 
 }  // namespace test
 }  // namespace net