[Sync] Convert DTCs to be not RefCounted and NonThreadSafe.

components/sync/driver/sync_api_component_factory_mock.cc

Index: components/sync/driver/sync_api_component_factory_mock.cc
diff --git a/components/sync/driver/sync_api_component_factory_mock.cc b/components/sync/driver/sync_api_component_factory_mock.cc
index 03e04e1f362ae7b80e3504d89edacaf91ed0af26..189b4576e99e2447100eeb033d25916059b96fac 100644
--- a/components/sync/driver/sync_api_component_factory_mock.cc
+++ b/components/sync/driver/sync_api_component_factory_mock.cc
@@ -27,9 +27,6 @@ SyncApiComponentFactoryMock::SyncApiComponentFactoryMock(
     : model_associator_(model_associator),
       change_processor_(change_processor),
       local_device_(new sync_driver::LocalDeviceInfoProviderMock()) {
-  ON_CALL(*this, CreateBookmarkSyncComponents(_, _))
-      .WillByDefault(InvokeWithoutArgs(
-          this, &SyncApiComponentFactoryMock::MakeSyncComponents));
 }
 
 SyncApiComponentFactoryMock::~SyncApiComponentFactoryMock() {}
@@ -45,6 +42,13 @@ SyncApiComponentFactoryMock::CreateAttachmentService(
 }
 
 sync_driver::SyncApiComponentFactory::SyncComponents
+SyncApiComponentFactoryMock::CreateBookmarkSyncComponents(
+    sync_driver::SyncService* sync_service,
+    std::unique_ptr<syncer::DataTypeErrorHandler> error_handler) {
+  return MakeSyncComponents();
+}
+
+sync_driver::SyncApiComponentFactory::SyncComponents
 SyncApiComponentFactoryMock::MakeSyncComponents() {
   return sync_driver::SyncApiComponentFactory::SyncComponents(
       model_associator_.release(), change_processor_.release());