Use file handles to interact with utility process.

chrome/service/cloud_print/printer_job_queue_handler.h

 // Copyright (c) 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.
 
 #ifndef CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_
 #define CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "chrome/common/cloud_print/cloud_print_constants.h"
 
 namespace base {
-  class DictionaryValue;
+class DictionaryValue;
 }
 
 namespace cloud_print {
 
 struct JobDetails {
   JobDetails();
   ~JobDetails();
   void Clear();
   static bool ordering(const JobDetails& first, const JobDetails& second);
 
@@ skipping 58 matching lines @@
   base::TimeDelta ComputeBackoffTime(const std::string& job_id);
 
   DISALLOW_COPY_AND_ASSIGN(PrinterJobQueueHandler);
 };
 
 }  // namespace cloud_print
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_PRINTER_JOB_QUEUE_HANDLER_H_