Remove #pragma once from content

content/renderer/renderer_restrict_dispatch_group.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 CONTENT_RENDERER_RESTRICT_DISPATCH_GROUP_H_
 #define CONTENT_RENDERER_RESTRICT_DISPATCH_GROUP_H_
-#pragma once
 
 #include "ipc/ipc_sync_channel.h"
 
 namespace content {
 
 // This represents all dispatch groups used in the renderer. Dispatch groups
 // allow channels to restrict in which case incoming messages can re-enter while
 // a synchronous message is sent on another channel. See
 // IPC::SyncChannel::SetRestrictDispatchChannelGroup.
 enum RendererRestrictDispatchGroup {
   kRendererRestrictDispatchGroup_None =
       IPC::SyncChannel::kRestrictDispatchGroup_None,
   kRendererRestrictDispatchGroup_Pepper,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RESTRICT_DISPATCH_GROUP_H_