Use scoped_ptr to pass settings in PrintJobWorker and PrinterQuery.

chrome/browser/printing/printer_query.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/browser/printing/printer_query.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 70 matching lines @@
   worker_->PostTask(FROM_HERE,
                     base::Bind(&PrintJobWorker::GetSettings,
                                base::Unretained(worker_.get()),
                                is_print_dialog_box_shown_,
                                base::Passed(&web_contents_observer),
                                expected_page_count,
                                has_selection,
                                margin_type));
 }
 
-void PrinterQuery::SetSettings(const base::DictionaryValue& new_settings,
+void PrinterQuery::SetSettings(scoped_ptr<base::DictionaryValue> new_settings,
                                const base::Closure& callback) {
   StartWorker(callback);
 
   worker_->PostTask(FROM_HERE,
                     base::Bind(&PrintJobWorker::SetSettings,
                                base::Unretained(worker_.get()),
-                               new_settings.DeepCopy()));
+                               base::Passed(&new_settings)));
 }
 
 void PrinterQuery::SetWorkerDestination(
     PrintDestinationInterface* destination) {
   worker_->SetPrintDestination(destination);
 }
 
 void PrinterQuery::StartWorker(const base::Closure& callback) {
   DCHECK(callback_.is_null());
   DCHECK(worker_.get());
@@ skipping 18 matching lines @@
 
 bool PrinterQuery::is_callback_pending() const {
   return !callback_.is_null();
 }
 
 bool PrinterQuery::is_valid() const {
   return worker_.get() != NULL;
 }
 
 }  // namespace printing