Sync: Don't set/use Parent ID for non-hierarchical sync data types.

sync/internal_api/sync_backup_manager_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sync/internal_api/sync_backup_manager.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "sync/internal_api/public/read_node.h"
 #include "sync/internal_api/public/read_transaction.h"
@@ skipping 60 matching lines @@
     manager->Init(&args);
     EXPECT_EQ(InternalComponentsFactory::STORAGE_ON_DISK_DEFERRED,
               storage_used_);
     loop_.PostTask(FROM_HERE, run_loop.QuitClosure());
     run_loop.Run();
   }
 
   void CreateEntry(UserShare* user_share, ModelType type,
                    const std::string& client_tag) {
     WriteTransaction trans(FROM_HERE, user_share);
-    ReadNode type_root(&trans);
-    EXPECT_EQ(BaseNode::INIT_OK, type_root.InitTypeRoot(type));
 
     WriteNode node(&trans);
     EXPECT_EQ(WriteNode::INIT_SUCCESS,
-              node.InitUniqueByCreation(type, type_root, client_tag));
+              node.InitUniqueByCreation(type, client_tag));
   }
 
   void ConfigureSyncer() {
     manager_->ConfigureSyncer(CONFIGURE_REASON_NEW_CLIENT,
                               ModelTypeSet(SEARCH_ENGINES),
                               ModelTypeSet(), ModelTypeSet(), ModelTypeSet(),
                               ModelSafeRoutingInfo(),
                               base::Bind(&OnConfigDone, true),
                               base::Bind(&OnConfigDone, false));
   }
@@ skipping 79 matching lines @@
 
 TEST_F(SyncBackupManagerTest, FailToInitialize) {
   // Test graceful shutdown on initialization failure.
   scoped_ptr<SyncBackupManager> manager(new SyncBackupManager);
   InitManager(manager.get(), InternalComponentsFactory::STORAGE_INVALID);
 }
 
 }  // anonymous namespace
 
 }  // namespace syncer