Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/infobars/infobar_utils.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_INFOBARS_INFOBAR_UTILS_H_
 #define IOS_CHROME_BROWSER_INFOBARS_INFOBAR_UTILS_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
 
 class ConfirmInfoBarDelegate;
 
 namespace infobars {
 class InfoBar;
 }
 
 // Returns a confirm infobar that owns |delegate|.
 // Visible for testing.
-scoped_ptr<infobars::InfoBar> CreateConfirmInfoBar(
-    scoped_ptr<ConfirmInfoBarDelegate> delegate);
+std::unique_ptr<infobars::InfoBar> CreateConfirmInfoBar(
+    std::unique_ptr<ConfirmInfoBarDelegate> delegate);
 
 #endif  // IOS_CHROME_BROWSER_INFOBARS_INFOBAR_UTILS_H_