Revert of Remove header dependencies from sequence_checker.h to sequenced_worker_pool.h

chrome/browser/chromeos/policy/system_log_uploader.cc

 // Copyright (c) 2015 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 <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/syslog_logging.h"
 #include "base/task_runner_util.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/policy/upload_job_impl.h"
 #include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
 #include "chrome/browser/chromeos/settings/device_oauth2_token_service_factory.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/feedback/anonymizer_tool.h"
 #include "components/policy/core/browser/browser_policy_connector.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/http/http_request_headers.h"
 #include "system_log_uploader.h"
@@ skipping 280 matching lines @@
   SYSLOG(INFO) << "Scheduling next system log upload " << delay << " from now.";
   // Ensure that we never have more than one pending delayed task.
   weak_factory_.InvalidateWeakPtrs();
   task_runner_->PostDelayedTask(FROM_HERE,
                                 base::Bind(&SystemLogUploader::StartLogUpload,
                                            weak_factory_.GetWeakPtr()),
                                 delay);
 }
 
 }  // namespace policy