[Sync] Remove unneeded 'using syncer::' lines and 'syncer::' scopings

sync/internal_api/base_transaction.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 "sync/internal_api/public/base_transaction.h"
 
 #include "sync/syncable/directory.h"
 #include "sync/util/cryptographer.h"
 
-using syncer::Cryptographer;
-
 namespace syncer {
 
 //////////////////////////////////////////////////////////////////////////
 // BaseTransaction member definitions
 BaseTransaction::BaseTransaction(UserShare* share) {
   DCHECK(share && share->directory.get());
   directory_ = share->directory.get();
 }
 BaseTransaction::~BaseTransaction() {
 }
 
-syncer::Cryptographer* BaseTransaction::GetCryptographer() const {
+Cryptographer* BaseTransaction::GetCryptographer() const {
   return directory_->GetCryptographer(this->GetWrappedTrans());
 }
 
-syncer::ModelTypeSet GetEncryptedTypes(const syncer::BaseTransaction* trans) {
+ModelTypeSet GetEncryptedTypes(const BaseTransaction* trans) {
   return trans->GetCryptographer()->GetEncryptedTypes();
 }
 
 }  // namespace syncer