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

ios/chrome/browser/infobars/infobar_utils.mm

 // 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 "ios/chrome/browser/infobars/infobar_utils.h"
 
+#include <memory>
 #include <utility>
 
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "ios/chrome/browser/infobars/confirm_infobar_controller.h"
 #include "ios/chrome/browser/infobars/infobar.h"
 
-scoped_ptr<infobars::InfoBar> CreateConfirmInfoBar(
-    scoped_ptr<ConfirmInfoBarDelegate> delegate) {
-  scoped_ptr<InfoBarIOS> infobar(new InfoBarIOS(std::move(delegate)));
+std::unique_ptr<infobars::InfoBar> CreateConfirmInfoBar(
+    std::unique_ptr<ConfirmInfoBarDelegate> delegate) {
+  std::unique_ptr<InfoBarIOS> infobar(new InfoBarIOS(std::move(delegate)));
   base::scoped_nsobject<ConfirmInfoBarController> controller(
       [[ConfirmInfoBarController alloc] initWithDelegate:infobar.get()]);
   infobar->SetController(controller);
   return std::move(infobar);
 }