base::ListValue::Append cleanup: pass unique_ptr instead of the released pointer.

extensions/browser/api/system_info/system_info_api.cc

Index: extensions/browser/api/system_info/system_info_api.cc
diff --git a/extensions/browser/api/system_info/system_info_api.cc b/extensions/browser/api/system_info/system_info_api.cc
index dbd983761502a83ea42aba7b0120162abf5f1a7f..163439116301ee938548cebb92f4254215e5d9eb 100644
--- a/extensions/browser/api/system_info/system_info_api.cc
+++ b/extensions/browser/api/system_info/system_info_api.cc
@@ -167,7 +167,7 @@ void SystemInfoEventRouter::OnRemovableStorageAttached(
   StorageUnitInfo unit;
   systeminfo::BuildStorageUnitInfo(info, &unit);
   std::unique_ptr<base::ListValue> args(new base::ListValue);
-  args->Append(unit.ToValue().release());
+  args->Append(unit.ToValue());
   DispatchEvent(events::SYSTEM_STORAGE_ON_ATTACHED,
                 system_storage::OnAttached::kEventName, std::move(args));
 }