Remove #pragma once from content

content/renderer/browser_plugin/old/browser_plugin_channel_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_RENDERER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_CHANNEL_MANAGER_H_
 #define CONTENT_RENDERER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_CHANNEL_MANAGER_H_
-#pragma once
 
 #include <set>
 
 #include "base/id_map.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "content/renderer/browser_plugin/old/guest_to_embedder_channel.h"
 #include "content/renderer/render_view_impl.h"
 
 class GuestToEmbedderChannel;
 struct ViewMsg_New_Params;
@@ skipping 55 matching lines @@
   // have a PP_Instance and so they aren't yet ready to composite.
   std::map<std::pair<std::string, int>,
            base::WeakPtr<RenderViewImpl> > pending_guests_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginChannelManager);
 };
 
 }  // namespace content
 
 #endif //  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_CHANNEL_MANAGER_H_