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

sync/internal_api/test/test_internal_components_factory.cc

Index: sync/internal_api/test/test_internal_components_factory.cc
diff --git a/sync/internal_api/test/test_internal_components_factory.cc b/sync/internal_api/test/test_internal_components_factory.cc
index c7d94e9b513d34a27786dd5c67ea7481bf087f9a..34c678be6e997d4035e1853f1920aee68508f0fc 100644
--- a/sync/internal_api/test/test_internal_components_factory.cc
+++ b/sync/internal_api/test/test_internal_components_factory.cc
@@ -5,6 +5,7 @@
 #include "sync/internal_api/public/test/test_internal_components_factory.h"
 
 #include "sync/sessions/sync_session_context.h"
+#include "sync/syncable/deferred_on_disk_directory_backing_store.h"
 #include "sync/syncable/in_memory_directory_backing_store.h"
 #include "sync/syncable/on_disk_directory_backing_store.h"
 #include "sync/syncable/invalid_directory_backing_store.h"
@@ -14,9 +15,11 @@ namespace syncer {
 
 TestInternalComponentsFactory::TestInternalComponentsFactory(
     const Switches& switches,
-    StorageOption option)
+    StorageOption option,
+    StorageOption* storage_used)
     : switches_(switches),
-      storage_option_(option) {
+      storage_override_(option),
+      storage_used_(storage_used) {
 }
 
 TestInternalComponentsFactory::~TestInternalComponentsFactory() { }
@@ -54,8 +57,12 @@ TestInternalComponentsFactory::BuildContext(
 
 scoped_ptr<syncable::DirectoryBackingStore>
 TestInternalComponentsFactory::BuildDirectoryBackingStore(
-      const std::string& dir_name, const base::FilePath& backing_filepath) {
-  switch (storage_option_) {
+    StorageOption storage, const std::string& dir_name,
+    const base::FilePath& backing_filepath) {
+  if (storage_used_)
+    *storage_used_ = storage;
+
+  switch (storage_override_) {
     case STORAGE_IN_MEMORY:
       return scoped_ptr<syncable::DirectoryBackingStore>(
           new syncable::InMemoryDirectoryBackingStore(dir_name));
@@ -63,6 +70,10 @@ TestInternalComponentsFactory::BuildDirectoryBackingStore(
       return scoped_ptr<syncable::DirectoryBackingStore>(
           new syncable::OnDiskDirectoryBackingStore(dir_name,
                                                     backing_filepath));
+    case STORAGE_ON_DISK_DEFERRED:
+      return scoped_ptr<syncable::DirectoryBackingStore>(
+          new syncable::DeferredOnDiskDirectoryBackingStore(dir_name,
+                                                            backing_filepath));
     case STORAGE_INVALID:
       return scoped_ptr<syncable::DirectoryBackingStore>(
           new syncable::InvalidDirectoryBackingStore());