base::Bind: Convert PrintingContext::PrintSettingsCallback.

printing/printing_context_gtk.cc

 // Copyright (c) 2011 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 "printing/printing_context_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gtk/gtkprintunixdialog.h>
 
 #include "base/logging.h"
@@ skipping 41 matching lines @@
 void PrintingContextGtk::PrintDocument(const Metafile* metafile) {
   DCHECK(print_dialog_);
   DCHECK(metafile);
   print_dialog_->PrintDocument(metafile, document_name_);
 }
 
 void PrintingContextGtk::AskUserForSettings(
     gfx::NativeView parent_view,
     int max_pages,
     bool has_selection,
-    PrintSettingsCallback* callback) {
+    const PrintSettingsCallback& callback) {
   print_dialog_->ShowDialog(callback);
 }
 
 PrintingContext::Result PrintingContextGtk::UseDefaultSettings() {
   DCHECK(!in_print_job_);
 
   ResetSettings();
   if (!print_dialog_) {
     print_dialog_ = create_dialog_func_(this);
     print_dialog_->AddRefToDialog();
@@ skipping 75 matching lines @@
   // Intentional No-op.
 }
 
 gfx::NativeDrawingContext PrintingContextGtk::context() const {
   // Intentional No-op.
   return NULL;
 }
 
 }  // namespace printing