[Sync] Refactor non-frontend DTC to handle new API properly.

chrome/browser/sync/glue/search_engine_data_type_controller.cc

Index: chrome/browser/sync/glue/search_engine_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/search_engine_data_type_controller.cc b/chrome/browser/sync/glue/search_engine_data_type_controller.cc
index 7e434c9e87a0913c20b802787ac49f2aa3ceaece..df6225779a0d6070fe85bb6fda7cff2a995e297a 100644
--- a/chrome/browser/sync/glue/search_engine_data_type_controller.cc
+++ b/chrome/browser/sync/glue/search_engine_data_type_controller.cc
@@ -70,7 +70,12 @@ void SearchEngineDataTypeController::CreateSyncComponents() {
       profile_sync_factory_->CreateSearchEngineSyncComponents(sync_service_,
                                                               this);
   set_model_associator(sync_components.model_associator);
-  set_change_processor(sync_components.change_processor);
+  change_processor_.reset(static_cast<GenericChangeProcessor*>(
+      sync_components.change_processor));
+}
+
+ChangeProcessor* SearchEngineDataTypeController::change_processor() const {
+  return change_processor_.get();
 }
 
 void SearchEngineDataTypeController::RecordUnrecoverableError(