Convert //ash from scoped_ptr to std::unique_ptr

ash/system/user/user_view.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 "ash/system/user/user_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "ash/multi_profile_uma.h"
@@ skipping 320 matching lines @@
 }
 
 void UserView::AddLogoutButton(user::LoginStatus login) {
   const base::string16 title =
       user::GetLocalizedSignOutStringForStatus(login, true);
   auto* logout_button = new TrayPopupLabelButton(this, title);
   logout_button->SetAccessibleName(title);
   logout_button_ = logout_button;
   // In public account mode, the logout button border has a custom color.
   if (login == user::LOGGED_IN_PUBLIC) {
-    scoped_ptr<TrayPopupLabelButtonBorder> border(
+    std::unique_ptr<TrayPopupLabelButtonBorder> border(
         new TrayPopupLabelButtonBorder());
     border->SetPainter(false,
                        views::Button::STATE_NORMAL,
                        views::Painter::CreateImageGridPainter(
                            kPublicAccountLogoutButtonBorderImagesNormal));
     border->SetPainter(false,
                        views::Button::STATE_HOVERED,
                        views::Painter::CreateImageGridPainter(
                            kPublicAccountLogoutButtonBorderImagesHovered));
     border->SetPainter(false,
@@ skipping 168 matching lines @@
   focus_manager_ = NULL;
   if (user_card_view_->GetFocusManager())
     user_card_view_->GetFocusManager()->ClearFocus();
   popup_message_.reset();
   mouse_watcher_.reset();
   add_menu_option_.reset();
 }
 
 }  // namespace tray
 }  // namespace ash