Remove unused include in sequenced_worker_pool.h

components/drive/chromeos/file_system.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 "components/drive/chromeos/file_system.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
+#include "base/sequenced_task_runner.h"
+#include "base/single_thread_task_runner.h"
 #include "components/drive/chromeos/change_list_loader.h"
 #include "components/drive/chromeos/directory_loader.h"
 #include "components/drive/chromeos/file_cache.h"
 #include "components/drive/chromeos/file_system/copy_operation.h"
 #include "components/drive/chromeos/file_system/create_directory_operation.h"
 #include "components/drive/chromeos/file_system/create_file_operation.h"
 #include "components/drive/chromeos/file_system/download_operation.h"
 #include "components/drive/chromeos/file_system/get_file_for_saving_operation.h"
 #include "components/drive/chromeos/file_system/move_operation.h"
 #include "components/drive/chromeos/file_system/open_file_operation.h"
@@ skipping 1042 matching lines @@
 
 void FileSystem::CalculateEvictableCacheSize(
     const CacheSizeCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!callback.is_null());
   base::PostTaskAndReplyWithResult(
       blocking_task_runner_.get(), FROM_HERE,
       base::Bind(&CalculateEvictableCacheSizeOnBlockingPool, cache_), callback);
 }
 }  // namespace drive