Remove the unused QUIC port selection logic.

chrome/browser/io_thread.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 "chrome/browser/io_thread.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 911 matching lines @@
                                                  is_quic_force_enabled,
                                                  quic_user_agent_id, params);
 
   // Command line flags override field trials.
   if (command_line.HasSwitch(switches::kIgnoreUrlFetcherCertRequests))
     net::URLFetcher::SetIgnoreCertificateRequests(true);
 
   if (command_line.HasSwitch(switches::kDisableHttp2))
     params->enable_http2 = false;
 
-  if (command_line.HasSwitch(switches::kDisableQuicPortSelection)) {
-    params->enable_quic_port_selection = false;
-  } else if (command_line.HasSwitch(switches::kEnableQuicPortSelection)) {
-    params->enable_quic_port_selection = true;
-  }
-
   if (params->enable_quic) {
     if (command_line.HasSwitch(switches::kQuicConnectionOptions)) {
       params->quic_connection_options =
           net::QuicUtils::ParseQuicConnectionOptions(
               command_line.GetSwitchValueASCII(
                   switches::kQuicConnectionOptions));
     }
 
     if (command_line.HasSwitch(switches::kQuicHostWhitelist)) {
       std::string whitelist =
@@ skipping 127 matching lines @@
   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
   // system URLRequestContext too. There's no reason this should be tied to a
   // profile.
   return context;
 }
 
 const metrics::UpdateUsagePrefCallbackType&
 IOThread::GetMetricsDataUseForwarder() {
   return metrics_data_use_forwarder_;
 }