Sync: Don't set/use Parent ID for non-hierarchical sync data types.

chrome/browser/sync/profile_sync_service_typed_url_unittest.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 <string>
 #include <utility>
 #include <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 191 matching lines @@
       new TypedUrlChangeProcessor(profile, *model_associator, hb, dtc);
   return ProfileSyncComponentsFactory::SyncComponents(*model_associator,
                                                       change_processor);
 }
 
 class ProfileSyncServiceTypedUrlTest : public AbstractProfileSyncServiceTest {
  public:
   void AddTypedUrlSyncNode(const history::URLRow& url,
                            const history::VisitVector& visits) {
     syncer::WriteTransaction trans(FROM_HERE, sync_service_->GetUserShare());
-    syncer::ReadNode typed_url_root(&trans);
-    ASSERT_EQ(syncer::BaseNode::INIT_OK,
-              typed_url_root.InitTypeRoot(syncer::TYPED_URLS));
 
     syncer::WriteNode node(&trans);
     std::string tag = url.url().spec();
     syncer::WriteNode::InitUniqueByCreationResult result =
-        node.InitUniqueByCreation(syncer::TYPED_URLS, typed_url_root, tag);
+        node.InitUniqueByCreation(syncer::TYPED_URLS, tag);
     ASSERT_EQ(syncer::WriteNode::INIT_SUCCESS, result);
     TypedUrlModelAssociator::WriteToSyncNode(url, visits, &node);
   }
 
  protected:
   ProfileSyncServiceTypedUrlTest()
       : profile_manager_(TestingBrowserProcess::GetGlobal()) {
     history_thread_.reset(new Thread("history"));
   }
 
@@ skipping 895 matching lines @@
   history::URLRows changed_urls;
   changed_urls.push_back(updated_url_entry);
   SendNotificationURLsModified(changed_urls);
 
   history::URLRows new_sync_entries;
   GetTypedUrlsFromSyncDB(&new_sync_entries);
 
   // The change should be ignored.
   ASSERT_EQ(0U, new_sync_entries.size());
 }