Remove #pragma once from content

content/public/browser/devtools_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 CONTENT_PUBLIC_BROWSER_DEVTOOLS_MANAGER_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_MANAGER_H_
-#pragma once
 
 #include <string>
 
 #include "content/common/content_export.h"
 #include "content/public/common/console_message_level.h"
 
 namespace IPC {
 class Message;
 }
 
@@ skipping 62 matching lines @@
   // Logs given |message| on behalf of the given |agent_host|.
   virtual void AddMessageToConsole(DevToolsAgentHost* agent_host,
                                    ConsoleMessageLevel level,
                                    const std::string& message) = 0;
 
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_MANAGER_H_