Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/chrome/browser/net/network_time_tracker.cc

 // Copyright (c) 2013 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 "chrome/browser/net/network_time_tracker.h"
 
-#include "base/task/sequenced_task_runner.h"
+#include "base/sequenced_task_runner.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/io_thread.h"
 
 namespace {
 
 // Helper functions for interacting with the NetworkTimeNotifier.
 // Registration happens as follows (assuming tracker lives on thread N):
 // | Thread N |                   | UI thread|                     | IO Thread |
 // Start
 //                         RegisterObserverOnUIThread
@@ skipping 118 matching lines @@
 void NetworkTimeTracker::OnNetworkTimeUpdate(
     const base::Time& network_time,
     const base::TimeTicks& network_time_ticks,
     const base::TimeDelta& network_time_uncertainty) {
   DCHECK(thread_checker_.CalledOnValidThread());
   network_time_ = network_time;
   network_time_ticks_ = network_time_ticks;
   network_time_uncertainty_ = network_time_uncertainty;
 }