Pass InteractionStats by value

chrome/browser/password_manager/password_store_mac.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/password_manager/password_store_mac.h"
 
 #include <CoreServices/CoreServices.h>
 #include <stddef.h>
 #include <algorithm>
 #include <set>
@@ skipping 1327 matching lines @@
   if (login_metadata_db_)
     login_metadata_db_->stats_table().AddRow(stats);
 }
 
 void PasswordStoreMac::RemoveSiteStatsImpl(const GURL& origin_domain) {
   DCHECK(GetBackgroundTaskRunner()->BelongsToCurrentThread());
   if (login_metadata_db_)
     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) {
   if (IsLoginDatabaseOnlyForm(form))
     return true;
   MacKeychainPasswordFormAdapter keychainAdapter(keychain_.get());
   return keychainAdapter.AddPassword(form);
 }
 
 bool PasswordStoreMac::DatabaseHasFormMatchingKeychainForm(
@@ skipping 55 matching lines @@
   ScopedVector<PasswordForm> forms_with_keychain_entry;
   internal_keychain_helpers::GetPasswordsForForms(*keychain_, &database_forms,
                                                   &forms_with_keychain_entry);
 
   // Clean up any orphaned database entries.
   RemoveDatabaseForms(&database_forms);
 
   // Move the orphaned DB forms to the output parameter.
   AppendSecondToFirst(orphaned_forms, &database_forms);
 }