fix build for Firestore copybara import (#1308)

* fix "target of using declaration conflicts with declaration already in scope"

* fix "call to implicitly-deleted copy constructor of *unique_ptr*"

1 files changed, 1 insertions, 1 deletions

diff --git a/Firestore/core/src/firebase/firestore/remote/serializer.cc b/Firestore/core/src/firebase/firestore/remote/serializer.cc
index 2ed5f54..26a06c6 100644
--- a/Firestore/core/src/firebase/firestore/remote/serializer.cc
+++ b/Firestore/core/src/firebase/firestore/remote/serializer.cc
@@ -485,7 +485,7 @@ Serializer::DecodeMaybeDocument(const uint8_t* bytes, size_t length) const {
       DecodeBatchGetDocumentsResponse(&reader);
 
   if (reader.status().ok()) {
-    return maybeDoc;
+    return std::move(maybeDoc);
   } else {
     return reader.status();
   }