Pass InteractionStats by value

components/password_manager/core/browser/mock_password_store.cc

Index: components/password_manager/core/browser/mock_password_store.cc
diff --git a/components/password_manager/core/browser/mock_password_store.cc b/components/password_manager/core/browser/mock_password_store.cc
index ef0c961e6fc3be54dc35dbecb6d18e78967cee86..b1c2ea92257dc414a81c944f04d28c8401168726 100644
--- a/components/password_manager/core/browser/mock_password_store.cc
+++ b/components/password_manager/core/browser/mock_password_store.cc
@@ -16,15 +16,4 @@ MockPasswordStore::MockPasswordStore()
 MockPasswordStore::~MockPasswordStore() {
 }
 
-std::vector<std::unique_ptr<InteractionsStats>>
-MockPasswordStore::GetSiteStatsImpl(const GURL& origin_domain) {
-  std::vector<InteractionsStats*> stats = GetSiteStatsMock(origin_domain);
-  std::vector<std::unique_ptr<InteractionsStats>> result;
-  result.reserve(stats.size());
-  for (auto* stat : stats) {
-    result.push_back(base::WrapUnique(stat));
-  }
-  return result;
-}
-
 }  // namespace password_manager