[Sync] Add support for loading, updating and querying delete journals in

sync/test/test_directory_backing_store.h

Index: sync/test/test_directory_backing_store.h
diff --git a/sync/test/test_directory_backing_store.h b/sync/test/test_directory_backing_store.h
index 6d2acb4aec9fe4704838bba3c47539aeccd7c41d..d5962ec4ad2ed36b8380fa5efc6fdf0ee95645c2 100644
--- a/sync/test/test_directory_backing_store.h
+++ b/sync/test/test_directory_backing_store.h
@@ -27,6 +27,7 @@ class TestDirectoryBackingStore : public DirectoryBackingStore {
   virtual ~TestDirectoryBackingStore();
   virtual DirOpenResult Load(
       MetahandlesIndex* entry_bucket,
+      IdsIndex* delete_journals,
       Directory::KernelLoadInfo* kernel_load_info) OVERRIDE;
 
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, MigrateVersion67To68);
@@ -45,6 +46,7 @@ class TestDirectoryBackingStore : public DirectoryBackingStore {
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, MigrateVersion80To81);
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, MigrateVersion81To82);
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, MigrateVersion82To83);
+  FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, MigrateVersion83To84);
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, DetectInvalidOrdinal);
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, ModelTypeIds);
   FRIEND_TEST_ALL_PREFIXES(DirectoryBackingStoreTest, Corruption);