Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/libgtk2ui/print_dialog_gtk2.cc

 // Copyright 2014 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/ui/libgtk2ui/print_dialog_gtk2.h"
 
 #include <gtk/gtkunixprint.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 213 matching lines @@
   PrintSettings settings;
   InitPrintSettings(&settings);
 }
 
 bool PrintDialogGtk2::UpdateSettings(printing::PrintSettings* settings) {
   if (!gtk_settings_) {
     gtk_settings_ =
         gtk_print_settings_copy(g_last_used_settings.Get().settings());
   }
 
-  scoped_ptr<GtkPrinterList> printer_list(new GtkPrinterList);
+  std::unique_ptr<GtkPrinterList> printer_list(new GtkPrinterList);
   printer_ = printer_list->GetPrinterWithName(
       base::UTF16ToUTF8(settings->device_name()));
   if (printer_) {
     g_object_ref(printer_);
     gtk_print_settings_set_printer(gtk_settings_,
                                    gtk_printer_get_name(printer_));
     if (!page_setup_) {
       page_setup_ = gtk_printer_get_default_page_size(printer_);
     }
   }
@@ skipping 306 matching lines @@
 void PrintDialogGtk2::OnWindowDestroying(aura::Window* window) {
   DCHECK_EQ(libgtk2ui::GetAuraTransientParent(dialog_), window);
 
   libgtk2ui::ClearAuraTransientParent(dialog_);
   window->RemoveObserver(this);
   if (!callback_.is_null()) {
     callback_.Run(PrintingContextLinux::CANCEL);
     callback_.Reset();
   }
 }