[NTP Snippets] Cleanups from clang-tidy

components/ntp_snippets/ntp_snippets_test_utils.cc

 // Copyright 2016 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 "components/ntp_snippets/ntp_snippets_test_utils.h"
 
 #include <memory>
 
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/testing_pref_service.h"
 #include "components/signin/core/browser/account_tracker_service.h"
 #include "components/signin/core/browser/fake_signin_manager.h"
 #include "components/signin/core/browser/test_signin_client.h"
 #include "components/signin/core/common/signin_pref_names.h"
 #include "components/sync/driver/fake_sync_service.h"
 
 namespace ntp_snippets {
 namespace test {
 
 FakeSyncService::FakeSyncService()
     : can_sync_start_(true),
       is_sync_active_(true),
       configuration_done_(true),
       is_encrypt_everything_enabled_(false),
       active_data_types_(syncer::HISTORY_DELETE_DIRECTIVES) {}
 
-FakeSyncService::~FakeSyncService() {}
+FakeSyncService::~FakeSyncService() = default;
 
 bool FakeSyncService::CanSyncStart() const {
   return can_sync_start_;
 }
 
 bool FakeSyncService::IsSyncActive() const {
   return is_sync_active_;
 }
 
 bool FakeSyncService::ConfigurationDone() const {
@@ skipping 24 matching lines @@
 
 NTPSnippetsTestUtils::~NTPSnippetsTestUtils() = default;
 
 void NTPSnippetsTestUtils::ResetSigninManager() {
   fake_signin_manager_.reset(
       new FakeSigninManagerBase(signin_client_.get(), account_tracker_.get()));
 }
 
 }  // namespace test
 }  // namespace ntp_snippets