Remove unused include in sequenced_worker_pool.h

components/drive/file_write_watcher.cc

 // Copyright 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 "components/drive/file_write_watcher.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path_watcher.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
 #include "base/timer/timer.h"
 #include "google_apis/drive/task_util.h"
 
 namespace drive {
 namespace internal {
 
 namespace {
 const int64_t kWriteEventDelayInSeconds = 5;
 }  // namespace
 
@@ skipping 172 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   watcher_impl_->StartWatch(file_path, on_start_callback, on_write_callback);
 }
 
 void FileWriteWatcher::DisableDelayForTesting() {
   watcher_impl_->set_delay(base::TimeDelta());
 }
 
 }  // namespace internal
 }  // namespace drive