Fix handling of undeletion within the syncer.

chrome/browser/sync/engine/verify_updates_command.cc

 // Copyright (c) 2009 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 "chrome/browser/sync/engine/verify_updates_command.h"
 
 #include "chrome/browser/sync/engine/syncer.h"
 #include "chrome/browser/sync/engine/syncer_proto_util.h"
 #include "chrome/browser/sync/engine/syncer_types.h"
@@ skipping 76 matching lines @@
   VerifyUpdateResult result = {VERIFY_FAIL, GROUP_PASSIVE};
 
   const bool deleted = entry.has_deleted() && entry.deleted();
   const bool is_directory = entry.IsFolder();
   const syncable::ModelType model_type = entry.GetModelType();
 
   if (!id.ServerKnows()) {
     LOG(ERROR) << "Illegal negative id in received updates";
     return result;
   }
-  if (!entry.parent_id().ServerKnows()) {
-    LOG(ERROR) << "Illegal parent id in received updates";
-    return result;
-  }
   {
     const std::string name = SyncerProtoUtil::NameFromSyncEntity(entry);
     if (name.empty() && !deleted) {
       LOG(ERROR) << "Zero length name in non-deleted update";
       return result;
     }
   }
 
   syncable::MutableEntry same_id(trans, GET_BY_ID, id);
   result.value = SyncerUtil::VerifyNewEntry(entry, &same_id, deleted);
@@ skipping 18 matching lines @@
         deleted, is_directory, model_type);
   }
 
   if (VERIFY_UNDECIDED == result.value)
     result.value = VERIFY_SUCCESS;  // No news is good news.
 
   return result;  // This might be VERIFY_SUCCESS as well
 }
 
 }  // namespace browser_sync