sync: Start moving away from PREV_ID and NEXT_ID

sync/internal_api/base_node.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 "sync/internal_api/public/base_node.h"
 
 #include <stack>
 
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
@@ skipping 177 matching lines @@
   return result;
 }
 
 bool BaseNode::HasChildren() const {
   syncable::Directory* dir = GetTransaction()->GetDirectory();
   syncable::BaseTransaction* trans = GetTransaction()->GetWrappedTrans();
   return dir->HasChildren(trans, GetEntry()->Get(syncable::ID));
 }
 
 int64 BaseNode::GetPredecessorId() const {
-  syncable::Id id_string = GetEntry()->Get(syncable::PREV_ID);
+  syncable::Id id_string = GetEntry()->GetPredecessorId();
   if (id_string.IsRoot())
     return kInvalidId;
   return IdToMetahandle(GetTransaction()->GetWrappedTrans(), id_string);
 }
 
 int64 BaseNode::GetSuccessorId() const {
-  syncable::Id id_string = GetEntry()->Get(syncable::NEXT_ID);
+  syncable::Id id_string = GetEntry()->GetSuccessorId();
   if (id_string.IsRoot())
     return kInvalidId;
   return IdToMetahandle(GetTransaction()->GetWrappedTrans(), id_string);
 }
 
 int64 BaseNode::GetFirstChildId() const {
   syncable::Directory* dir = GetTransaction()->GetDirectory();
   syncable::BaseTransaction* trans = GetTransaction()->GetWrappedTrans();
   syncable::Id id_string;
   // TODO(akalin): Propagate up the error further (see
@@ skipping 19 matching lines @@
     if (handle == kInvalidId)
       continue;
     count++;
     syncable::Entry entry(trans, syncable::GET_BY_HANDLE, handle);
     if (!entry.good())
       continue;
     syncable::Id id = entry.Get(syncable::ID);
     syncable::Id child_id;
     if (dir->GetFirstChildId(trans, id, &child_id) && !child_id.IsRoot())
       stack.push(IdToMetahandle(trans, child_id));
-    syncable::Id successor_id = entry.Get(syncable::NEXT_ID);
+    syncable::Id successor_id = entry.GetSuccessorId();
     if (!successor_id.IsRoot())
       stack.push(IdToMetahandle(trans, successor_id));
   }
   return count;
 }
 
 DictionaryValue* BaseNode::GetSummaryAsValue() const {
   DictionaryValue* node_info = new DictionaryValue();
   node_info->SetString("id", base::Int64ToString(GetId()));
   node_info->SetBoolean("isFolder", GetIsFolder());
@@ skipping 99 matching lines @@
     const sync_pb::EntitySpecifics& specifics) {
   ModelType type = GetModelTypeFromSpecifics(specifics);
   DCHECK_NE(UNSPECIFIED, type);
   if (GetModelType() != UNSPECIFIED) {
     DCHECK_EQ(GetModelType(), type);
   }
   unencrypted_data_.CopyFrom(specifics);
 }
 
 }  // namespace syncer