Remove #pragma once from sync

sync/engine/net/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_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_
 #define SYNC_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_
-#pragma once
 
 #include <iosfwd>
 #include <string>
 
 #include "base/atomicops.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/non_thread_safe.h"
@@ skipping 326 matching lines @@
 // settings.
 bool FillMessageWithShareDetails(sync_pb::ClientToServerMessage* csm,
                                  syncable::Directory* manager,
                                  const std::string& share);
 
 std::ostream& operator<<(std::ostream& s, const struct HttpResponse& hr);
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_NET_SERVER_CONNECTION_MANAGER_H_