Update from https://crrev.com/316786

net/socket/client_socket_pool_base.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/socket/client_socket_pool_base.h"
 
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
-#include "base/metrics/stats_counters.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 
 using base::TimeDelta;
 
@@ skipping 1215 matching lines @@
     return;
   }
 
   if (pending_requests_.empty())
     return;
 
   scoped_ptr<ConnectJob> backup_job =
       pool->connect_job_factory_->NewConnectJob(
           group_name, *pending_requests_.FirstMax().value(), pool);
   backup_job->net_log().AddEvent(NetLog::TYPE_BACKUP_CONNECT_JOB_CREATED);
-  SIMPLE_STATS_COUNTER("socket.backup_created");
   int rv = backup_job->Connect();
   pool->connecting_socket_count_++;
   ConnectJob* raw_backup_job = backup_job.get();
   AddJob(backup_job.Pass(), false);
   if (rv != ERR_IO_PENDING)
     pool->OnConnectJobComplete(rv, raw_backup_job);
 }
 
 void ClientSocketPoolBaseHelper::Group::SanityCheck() {
   DCHECK_LE(unassigned_job_count_, jobs_.size());
@@ skipping 74 matching lines @@
   pending_requests_.Erase(pointer);
   // If there are no more requests, kill the backup timer.
   if (pending_requests_.empty())
     backup_job_timer_.Stop();
   return request.Pass();
 }
 
 }  // namespace internal
 
 }  // namespace net