Make some code gender neutral.

chrome/browser/printing/print_job_worker.h

 // 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.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 25 matching lines @@
 class PrintJobWorker {
  public:
   PrintJobWorker(int render_process_id,
                  int render_view_id,
                  PrintJobWorkerOwner* owner);
   virtual ~PrintJobWorker();
 
   void SetNewOwner(PrintJobWorkerOwner* new_owner);
 
   // Initializes the print settings. If |ask_user_for_settings| is true, a
-  // Print... dialog box will be shown to ask the user his preference.
+  // Print... dialog box will be shown to ask the user their preference.
   // |is_scripted| should be true for calls coming straight from window.print().
   // |is_modifiable| implies HTML and not other formats like PDF.
   void GetSettings(bool ask_user_for_settings,
                    int document_page_count,
                    bool has_selection,
                    MarginType margin_type,
                    bool is_scripted,
                    bool is_modifiable);
 
   // Set the new print settings.
@@ skipping 95 matching lines @@
 
   // Used to generate a WeakPtr for callbacks.
   base::WeakPtrFactory<PrintJobWorker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintJobWorker);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_JOB_WORKER_H_