Populate versions on individual nodes in sync model and native bookmark model.

sync/internal_api/write_transaction.cc

Index: sync/internal_api/write_transaction.cc
diff --git a/sync/internal_api/write_transaction.cc b/sync/internal_api/write_transaction.cc
index fe11adf6479d435bcc3640fb0002c2f55a163901..cf0f1210af525bd6b8ab09746ec4db2fe245fc30 100644
--- a/sync/internal_api/write_transaction.cc
+++ b/sync/internal_api/write_transaction.cc
@@ -18,6 +18,16 @@ WriteTransaction::WriteTransaction(const tracked_objects::Location& from_here,
                                                 share->directory.get());
 }
 
+WriteTransaction::WriteTransaction(const tracked_objects::Location& from_here,
+                                   UserShare* share,
+                                   int64* new_model_version)
+    : BaseTransaction(share),
+      transaction_(NULL) {
+  transaction_ = new syncable::WriteTransaction(from_here,
+                                                share->directory.get(),
+                                                new_model_version);
+}
+
 WriteTransaction::~WriteTransaction() {
   delete transaction_;
 }