[Sync] Implement support for updating storage key for new entities

components/sync/model/fake_model_type_change_processor.h

Index: components/sync/model/fake_model_type_change_processor.h
diff --git a/components/sync/model/fake_model_type_change_processor.h b/components/sync/model/fake_model_type_change_processor.h
index 42886611dd4e32e14cea1199af5170aed878adbd..309c41f7e0d7549728947817d15e6243f2dadb52 100644
--- a/components/sync/model/fake_model_type_change_processor.h
+++ b/components/sync/model/fake_model_type_change_processor.h
@@ -33,8 +33,8 @@ class FakeModelTypeChangeProcessor : public ModelTypeChangeProcessor {
            MetadataChangeList* metadata_change_list) override;
   void Delete(const std::string& client_tag,
               MetadataChangeList* metadata_change_list) override;
-  void UpdateStorageKey(const std::string& old_storage_key,
-                        const std::string& new_storage_key,
+  void UpdateStorageKey(const EntityData& entity_data,
+                        const std::string& storage_key,
                         MetadataChangeList* metadata_change_list) override;
   void ModelReadyToSync(std::unique_ptr<MetadataBatch> batch) override;
   void OnSyncStarting(const ModelErrorHandler& error_handler,