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

chrome/browser/ui/ash/chrome_new_window_delegate.h

 // Copyright 2013 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_UI_ASH_CHROME_NEW_WINDOW_DELEGATE_H_
 #define CHROME_BROWSER_UI_ASH_CHROME_NEW_WINDOW_DELEGATE_H_
 
+#include <memory>
+
 #include "ash/new_window_delegate.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 class Browser;
 
 class ChromeNewWindowDelegate : public ash::NewWindowDelegate {
  public:
   ChromeNewWindowDelegate();
   ~ChromeNewWindowDelegate() override;
 
   // Overridden from ash::NewWindowDelegate:
   void NewTab() override;
   void NewWindow(bool incognito) override;
   void RestoreTab() override;
   void ShowTaskManager() override;
   void OpenFeedbackPage() override;
 
  private:
   class TabRestoreHelper;
 
-  scoped_ptr<TabRestoreHelper> tab_restore_helper_;
+  std::unique_ptr<TabRestoreHelper> tab_restore_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeNewWindowDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_NEW_WINDOW_DELEGATE_H_