Remove #pragma once from content

content/renderer/devtools_agent_filter.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_RENDERER_DEVTOOLS_AGENT_FILTER_H_
 #define CONTENT_RENDERER_DEVTOOLS_AGENT_FILTER_H_
-#pragma once
 
 #include <string>
 
 #include "ipc/ipc_channel_proxy.h"
 
 class MessageLoop;
 struct DevToolsMessageData;
 
 // DevToolsAgentFilter is registered as an IPC filter in order to be able to
 // dispatch messages while on the IO thread. The reason for that is that while
@@ skipping 17 matching lines @@
  private:
   void OnDispatchOnInspectorBackend(const std::string& message);
 
   bool message_handled_;
   MessageLoop* render_thread_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsAgentFilter);
 };
 
 #endif  // CONTENT_RENDERER_DEVTOOLS_AGENT_FILTER_H_