Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/views/toast_contents_view.cc

Index: ui/message_center/views/toast_contents_view.cc
diff --git a/ui/message_center/views/toast_contents_view.cc b/ui/message_center/views/toast_contents_view.cc
index fd2cb46a50d74e16e8e609a7616cfc379d3d89b5..0852aca404c43b04e7551063b59681fbf242ec4a 100644
--- a/ui/message_center/views/toast_contents_view.cc
+++ b/ui/message_center/views/toast_contents_view.cc
@@ -4,9 +4,10 @@
 
 #include "ui/message_center/views/toast_contents_view.h"
 
+#include <memory>
+
 #include "base/bind.h"
 #include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
@@ -313,9 +314,9 @@ void ToastContentsView::RemoveNotification(
     collection_->RemoveNotification(notification_id, by_user);
 }
 
-scoped_ptr<ui::MenuModel> ToastContentsView::CreateMenuModel(
-      const NotifierId& notifier_id,
-      const base::string16& display_source) {
+std::unique_ptr<ui::MenuModel> ToastContentsView::CreateMenuModel(
+    const NotifierId& notifier_id,
+    const base::string16& display_source) {
   // Should not reach, the context menu should be handled in
   // MessagePopupCollection.
   NOTREACHED();