Remove #pragma once from content

content/browser/renderer_host/render_sandbox_host_linux.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.
 
 // http://code.google.com/p/chromium/wiki/LinuxSandboxIPC
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_SANDBOX_HOST_LINUX_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_SANDBOX_HOST_LINUX_H_
-#pragma once
 
 #include <string>
 
 #include "base/logging.h"
 #include "content/common/content_export.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 // This is a singleton object which handles sandbox requests from the
 // renderers.
@@ skipping 24 matching lines @@
   bool initialized_;
 
   int renderer_socket_;
   int childs_lifeline_fd_;
   pid_t pid_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderSandboxHostLinux);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_SANDBOX_HOST_LINUX_H_