sync: Specialize functions that fetch type root

chrome/browser/sync/glue/synced_device_tracker.cc

 // Copyright (c) 2012 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 "chrome/browser/sync/glue/synced_device_tracker.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/sync/glue/device_info.h"
 #include "sync/internal_api/public/base/model_type.h"
@@ skipping 86 matching lines @@
 void SyncedDeviceTracker::GetAllSyncedDeviceInfo(
     ScopedVector<DeviceInfo>* device_info) const {
   if (device_info == NULL)
     return;
 
   device_info->clear();
 
   syncer::ReadTransaction trans(FROM_HERE, user_share_);
   syncer::ReadNode root_node(&trans);
 
-  if (root_node.InitByTagLookup(
-          syncer::ModelTypeToRootTag(syncer::DEVICE_INFO)) !=
+  if (root_node.InitTypeRoot(syncer::DEVICE_INFO) !=
       syncer::BaseNode::INIT_OK) {
     return;
   }
 
   // Get all the children of the root node and use the child id to read
   // device info for devices.
   std::vector<int64> children;
   root_node.GetChildIds(&children);
 
   for (std::vector<int64>::const_iterator it = children.begin();
@@ skipping 56 matching lines @@
   syncer::WriteTransaction trans(FROM_HERE, user_share_);
   syncer::WriteNode node(&trans);
 
   if (node.InitByClientTagLookup(syncer::DEVICE_INFO, tag) ==
       syncer::BaseNode::INIT_OK) {
     node.SetDeviceInfoSpecifics(specifics);
     node.SetTitle(specifics.client_name());
   } else {
     syncer::ReadNode type_root(&trans);
     syncer::BaseNode::InitByLookupResult type_root_lookup_result =
-        type_root.InitByTagLookup(ModelTypeToRootTag(syncer::DEVICE_INFO));
+        type_root.InitTypeRoot(syncer::DEVICE_INFO);
     DCHECK_EQ(syncer::BaseNode::INIT_OK, type_root_lookup_result);
 
     syncer::WriteNode new_node(&trans);
     syncer::WriteNode::InitUniqueByCreationResult create_result =
         new_node.InitUniqueByCreation(syncer::DEVICE_INFO,
                                       type_root,
                                       tag);
     DCHECK_EQ(syncer::WriteNode::INIT_SUCCESS, create_result);
     new_node.SetDeviceInfoSpecifics(specifics);
     new_node.SetTitle(specifics.client_name());
   }
 }
 
 }  // namespace browser_sync