Remove #pragma once from sync

sync/internal_api/syncapi_server_connection_manager.h

 // 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.
 
 #ifndef SYNC_INTERNAL_API_SYNCAPI_SERVER_CONNECTION_MANAGER_H_
 #define SYNC_INTERNAL_API_SYNCAPI_SERVER_CONNECTION_MANAGER_H_
-#pragma once
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "sync/engine/net/server_connection_manager.h"
 
 namespace syncer {
 
@@ skipping 50 matching lines @@
   // A factory creating concrete HttpPostProviders for use whenever we need to
   // issue a POST to sync servers.
   scoped_ptr<HttpPostProviderFactory> post_provider_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncAPIServerConnectionManager);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNCAPI_SERVER_CONNECTION_MANAGER_H_