Update from https://crrev.com/306655

net/http/disk_based_cert_cache.cc

 // Copyright (c) 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/http/disk_based_cert_cache.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/disk_cache.h"
 
 namespace net {
 
 namespace {
 
@@ skipping 367 matching lines @@
 void DiskBasedCertCache::ReadWorker::AddCallback(
     const GetCallback& user_callback) {
   user_callbacks_.push_back(user_callback);
 }
 
 void DiskBasedCertCache::ReadWorker::Cancel() {
   canceled_ = true;
 }
 
 void DiskBasedCertCache::ReadWorker::OnIOComplete(int rv) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 DiskBasedCertCache::ReadWorker::OnIOComplete"));
+
   if (canceled_) {
     Finish(ERR_FAILED);
     return;
   }
 
   rv = DoLoop(rv);
 
   if (rv == ERR_IO_PENDING)
     return;
 
@@ skipping 179 matching lines @@
 
 void DiskBasedCertCache::FinishedWriteOperation(
     const std::string& key,
     X509Certificate::OSCertHandle cert_handle) {
   write_worker_map_.erase(key);
   if (!key.empty())
     mru_cert_cache_.Put(key, X509Certificate::DupOSCertHandle(cert_handle));
 }
 
 }  // namespace net