Update from https://crrev.com/307330

net/socket/transport_client_socket_pool.h

 // 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.
 
 #ifndef NET_SOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_
 #define NET_SOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "net/base/host_port_pair.h"
 #include "net/dns/host_resolver.h"
 #include "net/dns/single_request_host_resolver.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/client_socket_pool_base.h"
 #include "net/socket/client_socket_pool_histograms.h"
 
 namespace net {
@@ skipping 289 matching lines @@
 void TransportConnectJobHelper::SetOnIOComplete(T* job) {
   // These usages of base::Unretained() are safe because IO callbacks are
   // guaranteed not to be called after the object is destroyed.
   on_io_complete_ = base::Bind(&TransportConnectJobHelper::OnIOComplete<T>,
                                base::Unretained(this),
                                base::Unretained(job));
 }
 
 template <class T>
 void TransportConnectJobHelper::OnIOComplete(T* job, int result) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 TransportConnectJobHelper::OnIOComplete"));
+
   result = this->DoLoop(job, result);
   if (result != ERR_IO_PENDING)
     job->NotifyDelegateOfCompletion(result);  // Deletes |job| and |this|
 }
 
 template <class T>
 int TransportConnectJobHelper::DoLoop(T* job, int result) {
   DCHECK_NE(next_state_, STATE_NONE);
 
   int rv = result;
@@ skipping 21 matching lines @@
         break;
     }
   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 
   return rv;
 }
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_