Pass InteractionStats by value

chrome/browser/password_manager/password_store_mac.cc

Index: chrome/browser/password_manager/password_store_mac.cc
diff --git a/chrome/browser/password_manager/password_store_mac.cc b/chrome/browser/password_manager/password_store_mac.cc
index ae3f6db91e43e92a116ca2f6d431829a68ff23e2..5d377405d5b9d44898642506515563fbf0ad0385 100644
--- a/chrome/browser/password_manager/password_store_mac.cc
+++ b/chrome/browser/password_manager/password_store_mac.cc
@@ -1345,13 +1345,12 @@ void PasswordStoreMac::RemoveSiteStatsImpl(const GURL& origin_domain) {
     login_metadata_db_->stats_table().RemoveRow(origin_domain);
 }
 
-std::vector<std::unique_ptr<password_manager::InteractionsStats>>
+std::vector<password_manager::InteractionsStats>
 PasswordStoreMac::GetSiteStatsImpl(const GURL& origin_domain) {
   DCHECK(GetBackgroundTaskRunner()->BelongsToCurrentThread());
   return login_metadata_db_
              ? login_metadata_db_->stats_table().GetRows(origin_domain)
-             : std::vector<
-                   std::unique_ptr<password_manager::InteractionsStats>>();
+             : std::vector<password_manager::InteractionsStats>();
 }
 
 bool PasswordStoreMac::AddToKeychainIfNecessary(const PasswordForm& form) {