Use emplace_back when adding an item to WebSocket stalled requests

net/socket/websocket_transport_client_socket_pool.cc

 // Copyright 2014 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/websocket_transport_client_socket_pool.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ skipping 324 matching lines @@
   NetLogTcpClientSocketPoolRequestedSocket(request_net_log, &casted_params);
 
   CHECK(!callback.is_null());
   CHECK(handle);
 
   request_net_log.BeginEvent(NetLogEventType::SOCKET_POOL);
 
   if (ReachedMaxSocketsLimit() &&
       respect_limits == ClientSocketPool::RespectLimits::ENABLED) {
     request_net_log.AddEvent(NetLogEventType::SOCKET_POOL_STALLED_MAX_SOCKETS);
-    // TODO(ricea): Use emplace_back when C++11 becomes allowed.
-    StalledRequest request(
-        casted_params, priority, handle, callback, request_net_log);
-    stalled_request_queue_.push_back(request);
+    stalled_request_queue_.emplace_back(casted_params, priority, handle,
+                                        callback, request_net_log);
     StalledRequestQueue::iterator iterator = stalled_request_queue_.end();
     --iterator;
     DCHECK_EQ(handle, iterator->handle);
     // Because StalledRequestQueue is a std::list, its iterators are guaranteed
     // to remain valid as long as the elements are not removed. As long as
     // stalled_request_queue_ and stalled_request_map_ are updated in sync, it
     // is safe to dereference an iterator in stalled_request_map_ to find the
     // corresponding list element.
     stalled_request_map_.insert(
         StalledRequestMap::value_type(handle, iterator));
@@ skipping 356 matching lines @@
       handle(handle),
       callback(callback),
       net_log(net_log) {}
 
 WebSocketTransportClientSocketPool::StalledRequest::StalledRequest(
     const StalledRequest& other) = default;
 
 WebSocketTransportClientSocketPool::StalledRequest::~StalledRequest() {}
 
 }  // namespace net