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

chrome/browser/chromeos/customization/customization_wallpaper_downloader.cc

 // Copyright 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 "chrome/browser/chromeos/customization/customization_wallpaper_downloader.h"
 
 #include <math.h>
 #include <algorithm>
 #include <utility>
 
 #include "base/files/file_util.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
 namespace chromeos {
 namespace {
 // This is temporary file suffix (for downloading or resizing).
@@ skipping 163 matching lines @@
   }
 }
 
 void CustomizationWallpaperDownloader::OnTemporaryFileRenamed(
     std::unique_ptr<bool> success) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   on_wallpaper_fetch_completed_.Run(*success, wallpaper_url_);
 }
 
 }  //   namespace chromeos