Disable backup connect jobs for all pools except TCPClientSocketPool

net/socket/client_socket_pool_base.cc

 // Copyright (c) 2006-2008 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/socket/client_socket_pool_base.h"
 
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/message_loop.h"
 #include "base/stats_counters.h"
@@ skipping 98 matching lines @@
     : idle_socket_count_(0),
       connecting_socket_count_(0),
       handed_out_socket_count_(0),
       max_sockets_(max_sockets),
       max_sockets_per_group_(max_sockets_per_group),
       unused_idle_socket_timeout_(unused_idle_socket_timeout),
       used_idle_socket_timeout_(used_idle_socket_timeout),
       may_have_stalled_group_(false),
       connect_job_factory_(connect_job_factory),
       network_change_notifier_(network_change_notifier),
+      backup_jobs_enabled_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)) {
   DCHECK_LE(0, max_sockets_per_group);
   DCHECK_LE(max_sockets_per_group, max_sockets);
 
   if (network_change_notifier_)
     network_change_notifier_->AddObserver(this);
 }
 
 ClientSocketPoolBaseHelper::~ClientSocketPoolBaseHelper() {
   CancelAllConnectJobs();
@@ skipping 107 matching lines @@
                                            job_net_log.source().id);
   }
 
   if (rv == OK) {
     HandOutSocket(connect_job->ReleaseSocket(), false /* not reused */,
                   handle, base::TimeDelta(), &group, request->net_log());
   } else if (rv == ERR_IO_PENDING) {
     // If we don't have any sockets in this group, set a timer for potentially
     // creating a new one.  If the SYN is lost, this backup socket may complete
     // before the slow socket, improving end user latency.
-    if (group.IsEmpty() && !group.backup_job) {
+    if (group.IsEmpty() && !group.backup_job && backup_jobs_enabled_) {
       group.backup_job = connect_job_factory_->NewConnectJob(group_name,
                                                              *request,
                                                              this,
                                                              job_net_log);
       StartBackupSocketTimer(group_name);
     }
 
     connecting_socket_count_++;
 
     ConnectJob* job = connect_job.release();
@@ skipping 450 matching lines @@
 bool ClientSocketPoolBaseHelper::ReachedMaxSocketsLimit() const {
   // Each connecting socket will eventually connect and be handed out.
   int total = handed_out_socket_count_ + connecting_socket_count_;
   DCHECK_LE(total, max_sockets_);
   return total == max_sockets_;
 }
 
 }  // namespace internal
 
 }  // namespace net