Remove #pragma once from content

content/browser/renderer_host/async_resource_handler.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_RENDERER_HOST_ASYNC_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_ASYNC_RESOURCE_HANDLER_H_
-#pragma once
 
 #include <string>
 
 #include "content/browser/renderer_host/resource_handler.h"
 #include "googleurl/src/gurl.h"
 
 namespace net {
 class URLRequest;
 }
 
@@ skipping 74 matching lines @@
   bool did_defer_;
 
   bool sent_received_response_msg_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_ASYNC_RESOURCE_HANDLER_H_