[USS] Change the place where SharedModelTypeProcessor got created

components/sync_driver/non_blocking_data_type_controller.h

Index: components/sync_driver/non_blocking_data_type_controller.h
diff --git a/components/sync_driver/non_blocking_data_type_controller.h b/components/sync_driver/non_blocking_data_type_controller.h
index d7369ac4a3a39c6b3275f96466e2e863c64ee17c..f6f713f6163b07316ee298fbff1760812a29be96 100644
--- a/components/sync_driver/non_blocking_data_type_controller.h
+++ b/components/sync_driver/non_blocking_data_type_controller.h
@@ -16,6 +16,8 @@ class SyncClient;
 
 namespace syncer_v2 {
 struct ActivationContext;
+class ModelTypeChangeProcessor;
+class ModelTypeService;
 class SharedModelTypeProcessor;
 }
 
@@ -106,6 +108,16 @@ class NonBlockingDataTypeController : public sync_driver::DataTypeController {
       syncer::SyncError error,
       scoped_ptr<syncer_v2::ActivationContext> activation_context);
 
+  // The function will do the work on model thread for function LoadModels().
+  void LoadModelsOnModelThread();
+
+  // The function will do the work on model thread for function Stop().
+  void StopOnModelThread();
+
+  // The function will create SharedModelTypeProcessor.
+  scoped_ptr<syncer_v2::ModelTypeChangeProcessor>
+  CreateSharedModelTypeProcessor(syncer_v2::ModelTypeService* service);
+
   // Model Type for this controller
   syncer::ModelType model_type_;