Remove #pragma once from content

content/public/browser/dom_operation_notification_details.h

 // Copyright (c) 2011 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.
 //
 // A class to hold the parameters we get back from the
 // ViewHostMsg_DomOperationResponse IPC call.  This is used when passing
 // parameters through the notification service.
 
 #ifndef CONTENT_PUBLIC_BROWSER_DOM_OPERATION_NOTIFICATION_DETAILS_H_
 #define CONTENT_PUBLIC_BROWSER_DOM_OPERATION_NOTIFICATION_DETAILS_H_
-#pragma once
 
 namespace content {
 
 struct DomOperationNotificationDetails {
  public:
   DomOperationNotificationDetails(const std::string& json, int automation_id)
     : json(json), automation_id(automation_id) { }
 
   std::string json;
   int automation_id;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOM_OPERATION_NOTIFICATION_DETAILS_H_