Remove stl_util's deletion function use from message center notifier settings.

chrome/browser/notifications/message_center_settings_controller.h

Index: chrome/browser/notifications/message_center_settings_controller.h
diff --git a/chrome/browser/notifications/message_center_settings_controller.h b/chrome/browser/notifications/message_center_settings_controller.h
index 7e534e6421c2aabe200b6dbadf5c80a6e2da39b5..59acae241498c38bc01abe3103686bd7afcf8a60 100644
--- a/chrome/browser/notifications/message_center_settings_controller.h
+++ b/chrome/browser/notifications/message_center_settings_controller.h
@@ -61,8 +61,8 @@ class MessageCenterSettingsController
   bool IsNotifierGroupActiveAt(size_t index) const override;
   void SwitchToNotifierGroup(size_t index) override;
   const message_center::NotifierGroup& GetActiveNotifierGroup() const override;
-  void GetNotifierList(
-      std::vector<message_center::Notifier*>* notifiers) override;
+  void GetNotifierList(std::vector<std::unique_ptr<message_center::Notifier>>*
+                           notifiers) override;
   void SetNotifierEnabled(const message_center::Notifier& notifier,
                           bool enabled) override;
   void OnNotifierSettingsClosing() override;