Remove #pragma once from content

content/browser/debugger/devtools_agent_host.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_BROWSER_DEBUGGER_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEBUGGER_DEVTOOLS_AGENT_HOST_H_
-#pragma once
 
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/public/common/console_message_level.h"
 
 namespace IPC {
 class Message;
 }
 
@@ skipping 33 matching lines @@
 
   virtual void SendMessageToAgent(IPC::Message* msg) = 0;
   void NotifyCloseListener();
 
   CloseListener* close_listener_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEBUGGER_DEVTOOLS_AGENT_HOST_H_