sync: Specialize functions that fetch type root

sync/engine/apply_control_data_updates_unittest.cc

 // Copyright 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 "base/format_macros.h"
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "sync/engine/apply_control_data_updates.h"
@@ skipping 170 matching lines @@
     EXPECT_TRUE(VerifyUnsyncedChangesAreEncrypted(&trans, encrypted_types));
 
     Syncer::UnsyncedMetaHandles handles;
     GetUnsyncedEntries(&trans, &handles);
     EXPECT_EQ(2*batch_s+1, handles.size());
   }
 
   // Simulate another nigori update that doesn't change anything.
   {
     syncable::WriteTransaction trans(FROM_HERE, UNITTEST, directory());
-    MutableEntry entry(&trans, syncable::GET_BY_SERVER_TAG,
-                       ModelTypeToRootTag(NIGORI));
+    MutableEntry entry(&trans, syncable::GET_TYPE_ROOT, NIGORI);
     ASSERT_TRUE(entry.good());
     entry.PutServerVersion(entry_factory_->GetNextRevision());
     entry.PutIsUnappliedUpdate(true);
   }
 
   ApplyControlDataUpdates(directory());
 
   EXPECT_FALSE(cryptographer->has_pending_keys());
   EXPECT_TRUE(cryptographer->is_ready());
   {
@@ skipping 708 matching lines @@
                                            local_specifics);
   ApplyControlDataUpdates(directory());
 
   EXPECT_FALSE(entry_factory_->GetIsUnappliedForItem(experiment_handle));
   EXPECT_TRUE(
       entry_factory_->GetLocalSpecificsForItem(experiment_handle).
           experiments().keystore_encryption().enabled());
 }
 
 }  // namespace syncer