Changed DB to store node positions as Ordinals.

sync/engine/process_commit_response_command.cc

Index: sync/engine/process_commit_response_command.cc
diff --git a/sync/engine/process_commit_response_command.cc b/sync/engine/process_commit_response_command.cc
index 8a00608f925bd143a18a35006565e753447bc870..803d6bf6ecfa96722bff3beaa83d85f9949bdd10 100644
--- a/sync/engine/process_commit_response_command.cc
+++ b/sync/engine/process_commit_response_command.cc
@@ -22,6 +22,11 @@
 #include "sync/syncable/write_transaction.h"
 #include "sync/util/time.h"
 
+// TODO(vishwath): Remove this include after node positions have
+// shifted to completely using Ordinals.
+// See http://crbug.com/145412 .
+#include "sync/internal_api/public/base/node_ordinal.h"
+
 using std::set;
 using std::string;
 using std::vector;
@@ -46,7 +51,7 @@ using syncable::IS_UNSYNCED;
 using syncable::PARENT_ID;
 using syncable::SERVER_IS_DEL;
 using syncable::SERVER_PARENT_ID;
-using syncable::SERVER_POSITION_IN_PARENT;
+using syncable::SERVER_ORDINAL_IN_PARENT;
 using syncable::SERVER_VERSION;
 using syncable::SYNCER;
 using syncable::SYNCING;
@@ -371,8 +376,9 @@ void ProcessCommitResponseCommand::UpdateServerFieldsAfterCommit(
                    ProtoTimeToTime(committed_entry.mtime()));
   local_entry->Put(syncable::SERVER_CTIME,
                    ProtoTimeToTime(committed_entry.ctime()));
-  local_entry->Put(syncable::SERVER_POSITION_IN_PARENT,
-      entry_response.position_in_parent());
+  local_entry->Put(syncable::SERVER_ORDINAL_IN_PARENT,
+                   Int64ToNodeOrdinal(entry_response.position_in_parent()));
+
   // TODO(nick): The server doesn't set entry_response.server_parent_id in
   // practice; to update SERVER_PARENT_ID appropriately here we'd need to
   // get the post-commit ID of the parent indicated by
@@ -420,7 +426,7 @@ void ProcessCommitResponseCommand::OverrideClientFieldsAfterCommit(
   if (entry_response.has_position_in_parent()) {
     // The SERVER_ field should already have been written.
     DCHECK_EQ(entry_response.position_in_parent(),
-        local_entry->Get(SERVER_POSITION_IN_PARENT));
+              NodeOrdinalToInt64(local_entry->Get(SERVER_ORDINAL_IN_PARENT)));
 
     // We just committed successfully, so we assume that the position
     // value we got applies to the PARENT_ID we submitted.