Update from https://crrev.com/309415

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 "base/compiler_specific.h"
 #include "base/lazy_instance.h"
@@ skipping 262 matching lines @@
   } else {
     int64 interval = (now - last_connect_time).InMilliseconds();
     if (interval <= 10)
       interval_between_connects_ = CONNECT_INTERVAL_LE_10MS;
     else if (interval <= 20)
       interval_between_connects_ = CONNECT_INTERVAL_LE_20MS;
     else
       interval_between_connects_ = CONNECT_INTERVAL_GT_20MS;
   }
 
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile1(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 TransportConnectJob::DoTransportConnect1"));
+
   helper_.set_next_state(
       TransportConnectJobHelper::STATE_TRANSPORT_CONNECT_COMPLETE);
   transport_socket_ =
       helper_.client_socket_factory()->CreateTransportClientSocket(
           helper_.addresses(), net_log().net_log(), net_log().source());
 
   // If the list contains IPv6 and IPv4 addresses, the first address will
   // be IPv6, and the IPv4 addresses will be tried as fallback addresses,
   // per "Happy Eyeballs" (RFC 6555).
   bool try_ipv6_connect_with_ipv4_fallback =
       helper_.addresses().front().GetFamily() == ADDRESS_FAMILY_IPV6 &&
       !AddressListOnlyContainsIPv6(helper_.addresses());
 
   // Enable TCP FastOpen if indicated by transport socket params.
   // Note: We currently do not turn on TCP FastOpen for destinations where
   // we try a TCP connect over IPv6 with fallback to IPv4.
   if (!try_ipv6_connect_with_ipv4_fallback &&
       helper_.params()->combine_connect_and_write() ==
           TransportSocketParams::COMBINE_CONNECT_AND_WRITE_DESIRED) {
     transport_socket_->EnableTCPFastOpenIfSupported();
   }
 
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 TransportConnectJob::DoTransportConnect2"));
+
   int rv = transport_socket_->Connect(helper_.on_io_complete());
+
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/436634 is fixed.
+  tracked_objects::ScopedTracker tracking_profile3(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "436634 TransportConnectJob::DoTransportConnect3"));
+
   if (rv == ERR_IO_PENDING && try_ipv6_connect_with_ipv4_fallback) {
     fallback_timer_.Start(
         FROM_HERE,
         base::TimeDelta::FromMilliseconds(
             TransportConnectJobHelper::kIPv6FallbackTimerInMs),
         this,
         &TransportConnectJob::DoIPv6FallbackTransportConnect);
   }
   return rv;
 }
@@ skipping 263 matching lines @@
     HigherLayeredPool* higher_pool) {
   base_.AddHigherLayeredPool(higher_pool);
 }
 
 void TransportClientSocketPool::RemoveHigherLayeredPool(
     HigherLayeredPool* higher_pool) {
   base_.RemoveHigherLayeredPool(higher_pool);
 }
 
 }  // namespace net