Pass InteractionStats by value

components/password_manager/core/browser/test_password_store.cc

Index: components/password_manager/core/browser/test_password_store.cc
diff --git a/components/password_manager/core/browser/test_password_store.cc b/components/password_manager/core/browser/test_password_store.cc
index fc70489e21056dc9594e9ea43c6066beabdd4e15..25589e28f9d991c9f1d048782f7d9599889ad633 100644
--- a/components/password_manager/core/browser/test_password_store.cc
+++ b/components/password_manager/core/browser/test_password_store.cc
@@ -166,9 +166,9 @@ void TestPasswordStore::AddSiteStatsImpl(const InteractionsStats& stats) {
 void TestPasswordStore::RemoveSiteStatsImpl(const GURL& origin_domain) {
 }
 
-std::vector<std::unique_ptr<InteractionsStats>>
-TestPasswordStore::GetSiteStatsImpl(const GURL& origin_domain) {
-  return std::vector<std::unique_ptr<InteractionsStats>>();
+std::vector<InteractionsStats> TestPasswordStore::GetSiteStatsImpl(
+    const GURL& origin_domain) {
+  return std::vector<InteractionsStats>();
 }
 
 }  // namespace password_manager