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

ios/chrome/browser/infobars/infobar_utils.mm

Index: ios/chrome/browser/infobars/infobar_utils.mm
diff --git a/ios/chrome/browser/infobars/infobar_utils.mm b/ios/chrome/browser/infobars/infobar_utils.mm
index f3e9a0b28618a96e1c62ba827ef564089a308024..37ad255a83cc4d155e27ffc7e36707c71666a0ad 100644
--- a/ios/chrome/browser/infobars/infobar_utils.mm
+++ b/ios/chrome/browser/infobars/infobar_utils.mm
@@ -4,17 +4,17 @@
 
 #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);