Remove unused include in sequenced_worker_pool.h

chrome/service/service_utility_process_host.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 "chrome/service/service_utility_process_host.h"
 
 #include <stdint.h>
 
 #include <queue>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/histogram.h"
 #include "base/process/launch.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/task_runner_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/win/win_util.h"
 #include "build/build_config.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_utility_printing_messages.h"
 #include "content/public/common/child_process_host.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/mojo_channel_switches.h"
@@ skipping 424 matching lines @@
     return false;
   }
   printing::Emf emf;
   if (!emf.InitFromData(data.data(), data.size())) {
     OnRenderPDFPagesToMetafileDone(false);
     return false;
   }
   OnRenderPDFPagesToMetafilePageDone(scale_factor, emf);
   return true;
 }