Adding instrumentation to locate the source of jankiness.

content/browser/net/sqlite_persistent_cookie_store.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 "content/browser/net/sqlite_persistent_cookie_store.h"
 
 #include <list>
 #include <map>
 #include <set>
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/time/time.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/cookie_crypto_delegate.h"
 #include "content/public/browser/cookie_store_factory.h"
 #include "content/public/common/content_switches.h"
@@ skipping 466 matching lines @@
   }
 
   PostClientTask(FROM_HERE, base::Bind(
       &SQLitePersistentCookieStore::Backend::CompleteLoadForKeyInForeground,
       this, loaded_callback, success));
 }
 
 void SQLitePersistentCookieStore::Backend::CompleteLoadForKeyInForeground(
     const LoadedCallback& loaded_callback,
     bool load_success) {
+  // TODO(pkasting): Remove ScopedTracker below once crbug.com/456373 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "456373 SQLitePersistentCookieStore::Backend::"
+          "CompleteLoadForKeyInForeground"));
   DCHECK(client_task_runner_->RunsTasksOnCurrentThread());
 
   Notify(loaded_callback, load_success);
 
   {
     base::AutoLock locked(metrics_lock_);
     num_priority_waiting_--;
     if (num_priority_waiting_ == 0) {
       priority_wait_duration_ +=
           base::Time::Now() - current_priority_wait_start_;
@@ skipping 841 matching lines @@
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableFileCookies)) {
     cookie_monster->SetEnableFileScheme(true);
   }
 
   return cookie_monster;
 }
 
 }  // namespace content