Let SyncBackupManager keep backup data in memory until shutdown. Only persist

sync/internal_api/sync_rollback_manager_base_unittest.cc

Index: sync/internal_api/sync_rollback_manager_base_unittest.cc
diff --git a/sync/internal_api/sync_rollback_manager_base_unittest.cc b/sync/internal_api/sync_rollback_manager_base_unittest.cc
index 74ffadc612b4f0116b0366ca280ed0ef73da1b00..014ee7d79c15eb112ae3a3315f10ec68e0588189 100644
--- a/sync/internal_api/sync_rollback_manager_base_unittest.cc
+++ b/sync/internal_api/sync_rollback_manager_base_unittest.cc
@@ -38,18 +38,22 @@ class SyncTestRollbackManager : public SyncRollbackManagerBase {
       scoped_ptr<UnrecoverableErrorHandler> unrecoverable_error_handler,
       ReportUnrecoverableErrorFunction report_unrecoverable_error_function,
       CancelationSignal* cancelation_signal) OVERRIDE {
-    SyncRollbackManagerBase::InitInternal(database_location,
-                                          internal_components_factory,
-                                          unrecoverable_error_handler.Pass(),
-                                          report_unrecoverable_error_function);
+    SyncRollbackManagerBase::InitInternal(
+        database_location,
+        internal_components_factory,
+        InternalComponentsFactory::STORAGE_IN_MEMORY,
+        unrecoverable_error_handler.Pass(),
+        report_unrecoverable_error_function);
   }
 };
 
 class SyncRollbackManagerBaseTest : public testing::Test {
  protected:
   virtual void SetUp() OVERRIDE {
-    TestInternalComponentsFactory factory(InternalComponentsFactory::Switches(),
-                                          STORAGE_IN_MEMORY);
+    TestInternalComponentsFactory factory(
+        InternalComponentsFactory::Switches(),
+        InternalComponentsFactory::STORAGE_IN_MEMORY,
+        InternalComponentsFactory::STORAGE_IN_MEMORY);
     manager_.Init(base::FilePath(base::FilePath::kCurrentDirectory),
                   MakeWeakHandle(base::WeakPtr<JsEventHandler>()),
                   GURL("https://example.com/"),