Changed DB to store node positions as Ordinals.

sync/syncable/mutable_entry.cc

Index: sync/syncable/mutable_entry.cc
diff --git a/sync/syncable/mutable_entry.cc b/sync/syncable/mutable_entry.cc
index 869320f33e20aa487ebbc4ecaefc015ed9f1d90e..86f289ee9e1a5316c16e1c9741ecabb47587af6f 100644
--- a/sync/syncable/mutable_entry.cc
+++ b/sync/syncable/mutable_entry.cc
@@ -141,14 +141,14 @@ bool MutableEntry::PutIsDel(bool is_del) {
   return true;
 }
 
-bool MutableEntry::Put(Int64Field field, const int64& value) {
+bool MutableEntry::Put(OrdinalField field, const NodeOrdinal& value) {
   DCHECK(kernel_);
   write_transaction_->SaveOriginal(kernel_);
-  if (kernel_->ref(field) != value) {
+  if(!kernel_->ref(field).Equals(value)) {
     ScopedKernelLock lock(dir());
-    if (SERVER_POSITION_IN_PARENT == field) {
-      ScopedIndexUpdater<ParentIdAndHandleIndexer> updater(lock, kernel_,
-          dir()->kernel_->parent_id_child_index);
+    if (SERVER_ORDINAL_IN_PARENT == field) {
+      ScopedIndexUpdater<ParentIdAndHandleIndexer> updater(
+          lock, kernel_, dir()->kernel_->parent_id_child_index);
       kernel_->put(field, value);
     } else {
       kernel_->put(field, value);
@@ -158,6 +158,17 @@ bool MutableEntry::Put(Int64Field field, const int64& value) {
   return true;
 }
 
+bool MutableEntry::Put(Int64Field field, const int64& value) {
+  DCHECK(kernel_);
+  write_transaction_->SaveOriginal(kernel_);
+  if (kernel_->ref(field) != value) {
+    ScopedKernelLock lock(dir());
+    kernel_->put(field, value);
+    kernel_->mark_dirty(dir()->kernel_->dirty_metahandles);
+  }
+  return true;
+}
+
 bool MutableEntry::Put(TimeField field, const base::Time& value) {
   DCHECK(kernel_);
   write_transaction_->SaveOriginal(kernel_);