sync: Specialize functions that fetch type root

sync/syncable/model_neutral_mutable_entry.cc

 // Copyright 2013 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/syncable/model_neutral_mutable_entry.h"
 
 #include <string>
 
 #include "sync/internal_api/public/base/unique_position.h"
 #include "sync/syncable/directory.h"
@@ skipping 42 matching lines @@
     BaseWriteTransaction* trans, GetByHandle, int64 metahandle)
     : Entry(trans, GET_BY_HANDLE, metahandle), base_write_transaction_(trans) {
 }
 
 ModelNeutralMutableEntry::ModelNeutralMutableEntry(
     BaseWriteTransaction* trans, GetByClientTag, const std::string& tag)
     : Entry(trans, GET_BY_CLIENT_TAG, tag), base_write_transaction_(trans) {
 }
 
 ModelNeutralMutableEntry::ModelNeutralMutableEntry(
-    BaseWriteTransaction* trans, GetByServerTag, const string& tag)
-    : Entry(trans, GET_BY_SERVER_TAG, tag), base_write_transaction_(trans) {
+    BaseWriteTransaction* trans, GetTypeRoot, ModelType type)
+    : Entry(trans, GET_TYPE_ROOT, type), base_write_transaction_(trans) {
 }
 
 void ModelNeutralMutableEntry::PutBaseVersion(int64 value) {
   DCHECK(kernel_);
   base_write_transaction_->TrackChangesTo(kernel_);
   if (kernel_->ref(BASE_VERSION) != value) {
     kernel_->put(BASE_VERSION, value);
     kernel_->mark_dirty(&dir()->kernel_->dirty_metahandles);
   }
 }
@@ skipping 297 matching lines @@
 ModelNeutralMutableEntry::ModelNeutralMutableEntry(BaseWriteTransaction* trans)
   : Entry(trans), base_write_transaction_(trans) {}
 
 MetahandleSet* ModelNeutralMutableEntry::GetDirtyIndexHelper() {
   return &dir()->kernel_->dirty_metahandles;
 }
 
 }  // namespace syncable
 
 }  // namespace syncer