First step to remove SingleRequestHostResolver.

net/socket/transport_client_socket_pool.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/transport_client_socket_pool.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ skipping 99 matching lines @@
       params_(params),
       resolver_(host_resolver),
       client_socket_factory_(client_socket_factory),
       next_state_(STATE_NONE),
       socket_performance_watcher_factory_(socket_performance_watcher_factory),
       interval_between_connects_(CONNECT_INTERVAL_GT_20MS),
       resolve_result_(OK) {}
 
 TransportConnectJob::~TransportConnectJob() {
   // We don't worry about cancelling the host resolution and TCP connect, since
-  // ~SingleRequestHostResolver and ~StreamSocket will take care of it.
+  // ~HostResolver::Request and ~StreamSocket will take care of it.
 }
 
 LoadState TransportConnectJob::GetLoadState() const {
   switch (next_state_) {
     case STATE_RESOLVE_HOST:
     case STATE_RESOLVE_HOST_COMPLETE:
       return LOAD_STATE_RESOLVING_HOST;
     case STATE_TRANSPORT_CONNECT:
     case STATE_TRANSPORT_CONNECT_COMPLETE:
       return LOAD_STATE_CONNECTING;
@@ skipping 130 matching lines @@
 }
 int TransportConnectJob::DoResolveHost() {
   // TODO(ricea): Remove ScopedTracker below once crbug.com/436634 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "436634 TransportConnectJob::DoResolveHost"));
 
   next_state_ = STATE_RESOLVE_HOST_COMPLETE;
   connect_timing_.dns_start = base::TimeTicks::Now();
 
-  return resolver_.Resolve(
+  return resolver_->Resolve(
       params_->destination(), priority(), &addresses_,
       base::Bind(&TransportConnectJob::OnIOComplete, base::Unretained(this)),
-      net_log());
+      &request_, net_log());
 }
 
 int TransportConnectJob::DoResolveHostComplete(int result) {
   TRACE_EVENT0("net", "TransportConnectJob::DoResolveHostComplete");
   connect_timing_.dns_end = base::TimeTicks::Now();
   // Overwrite connection start time, since for connections that do not go
   // through proxies, |connect_start| should not include dns lookup time.
   connect_timing_.connect_start = connect_timing_.dns_end;
   resolve_result_ = result;
 
@@ skipping 366 matching lines @@
     HigherLayeredPool* higher_pool) {
   base_.AddHigherLayeredPool(higher_pool);
 }
 
 void TransportClientSocketPool::RemoveHigherLayeredPool(
     HigherLayeredPool* higher_pool) {
   base_.RemoveHigherLayeredPool(higher_pool);
 }
 
 }  // namespace net