[Sync] Plumb initial type set from engine to DTM.

components/sync/driver/generic_change_processor_unittest.cc

Index: components/sync/driver/generic_change_processor_unittest.cc
diff --git a/components/sync/driver/generic_change_processor_unittest.cc b/components/sync/driver/generic_change_processor_unittest.cc
index dc3d1bd6435669666d9188bfc943394782912106..c29dd7f1bf42c0a85e54eb28226bdb3de16255be 100644
--- a/components/sync/driver/generic_change_processor_unittest.cc
+++ b/components/sync/driver/generic_change_processor_unittest.cc
@@ -70,10 +70,11 @@ class MockSyncApiComponentFactory : public SyncApiComponentFactory {
       SyncService* sync_service,
       const RegisterDataTypesMethod& register_platform_types_method) override {}
   DataTypeManager* CreateDataTypeManager(
+      ModelTypeSet initial_types,
       const WeakHandle<DataTypeDebugInfoListener>& debug_info_listener,
       const DataTypeController::TypeMap* controllers,
       const DataTypeEncryptionHandler* encryption_handler,
-      SyncEngine* backend,
+      ModelTypeConfigurer* configurer,
       DataTypeManagerObserver* observer) override {
     return nullptr;
   };