Re-write many calls to WrapUnique() with MakeUnique()

services/ui/ws/display_manager.cc

Index: services/ui/ws/display_manager.cc
diff --git a/services/ui/ws/display_manager.cc b/services/ui/ws/display_manager.cc
index 8f37fd9394bad147ee46681ad01fb3f5dbba6328..993375261062d9d1b55ea34a286e516931fb7798 100644
--- a/services/ui/ws/display_manager.cc
+++ b/services/ui/ws/display_manager.cc
@@ -36,7 +36,7 @@ UserDisplayManager* DisplayManager::GetUserDisplayManager(
     const UserId& user_id) {
   if (!user_display_managers_.count(user_id)) {
     user_display_managers_[user_id] =
-        base::WrapUnique(new UserDisplayManager(this, delegate_, user_id));
+        base::MakeUnique<UserDisplayManager>(this, delegate_, user_id);
   }
   return user_display_managers_[user_id].get();
 }