Use scoped_ptr to pass settings in PrintJobWorker and PrinterQuery.

chrome/browser/printing/printer_query.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_PRINTER_QUERY_H_
 #define CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 35 matching lines @@
   // |ask_for_user_settings| is DEFAULTS.
   void GetSettings(
       GetSettingsAskParam ask_user_for_settings,
       scoped_ptr<PrintingUIWebContentsObserver> web_contents_observer,
       int expected_page_count,
       bool has_selection,
       MarginType margin_type,
       const base::Closure& callback);
 
   // Updates the current settings with |new_settings| dictionary values.
-  void SetSettings(const base::DictionaryValue& new_settings,
+  void SetSettings(scoped_ptr<base::DictionaryValue> new_settings,
                    const base::Closure& callback);
 
   // Set a destination for the worker.
   void SetWorkerDestination(PrintDestinationInterface* destination);
 
   // Stops the worker thread since the client is done with this object.
   void StopWorker();
 
   // Returns true if a GetSettings() call is pending completion.
   bool is_callback_pending() const;
@@ skipping 28 matching lines @@
 
   // Callback waiting to be run.
   base::Closure callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PrinterQuery);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_