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

ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h

Index: ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h
diff --git a/ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h b/ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h
index cf9117ee26c469e17d63a8a035fb62c09275dd5e..b3781078d43a723f9dffcf24094ac536797d8c21 100644
--- a/ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h
+++ b/ios/chrome/browser/passwords/ios_chrome_save_password_infobar_delegate.h
@@ -5,8 +5,9 @@
 #ifndef IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_SAVE_PASSWORD_INFOBAR_DELEGATE_H_
 #define IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_SAVE_PASSWORD_INFOBAR_DELEGATE_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/password_manager/core/browser/password_manager_metrics_util.h"
 
@@ -29,14 +30,14 @@ class IOSChromeSavePasswordInfoBarDelegate : public ConfirmInfoBarDelegate {
   static void Create(
       bool is_smart_lock_branding_enabled,
       infobars::InfoBarManager* infobar_manager,
-      scoped_ptr<password_manager::PasswordFormManager> form_to_save);
+      std::unique_ptr<password_manager::PasswordFormManager> form_to_save);
 
   ~IOSChromeSavePasswordInfoBarDelegate() override;
 
  private:
   IOSChromeSavePasswordInfoBarDelegate(
       bool is_smart_lock_branding_enabled,
-      scoped_ptr<password_manager::PasswordFormManager> form_to_save);
+      std::unique_ptr<password_manager::PasswordFormManager> form_to_save);
 
   // ConfirmInfoBarDelegate implementation.
   Type GetInfoBarType() const override;
@@ -51,7 +52,7 @@ class IOSChromeSavePasswordInfoBarDelegate : public ConfirmInfoBarDelegate {
 
   // The password_manager::PasswordFormManager managing the form we're asking
   // the user about, and should update as per her decision.
-  scoped_ptr<password_manager::PasswordFormManager> form_to_save_;
+  std::unique_ptr<password_manager::PasswordFormManager> form_to_save_;
 
   // Used to track the results we get from the info bar.
   password_manager::metrics_util::UIDismissalReason infobar_response_;