[USS] Change the place where SharedModelTypeProcessor got created

sync/internal_api/public/test/fake_model_type_service.h

Index: sync/internal_api/public/test/fake_model_type_service.h
diff --git a/sync/internal_api/public/test/fake_model_type_service.h b/sync/internal_api/public/test/fake_model_type_service.h
index 966680a9a796ad36bd90c55b41f0fb03d0330c18..571ae7be4cd50ff68e77de389d84c38f78461b29 100644
--- a/sync/internal_api/public/test/fake_model_type_service.h
+++ b/sync/internal_api/public/test/fake_model_type_service.h
@@ -42,6 +42,15 @@ class FakeModelTypeService
   std::string GetClientTag(const EntityData& entity_data) override;
 
   void OnChangeProcessorSet() override;
+
+  syncer::ModelType type() const override;
+
+  ModelTypeChangeProcessor* CreateProcessorForTest();
+
+  // The function will create SharedModelTypeProcessor.
+  static scoped_ptr<ModelTypeChangeProcessor> CreateSharedModelTypeProcessor(
+      syncer::ModelType type,
+      ModelTypeService* service);
 };
 
 }  // namespace syncer_v2