RefCounted types should not have public destructors, chrome/browser/ part 6

chrome/browser/renderer_host/plugin_info_message_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 CHROME_BROWSER_RENDERER_HOST_PLUGIN_INFO_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_RENDERER_HOST_PLUGIN_INFO_MESSAGE_FILTER_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "chrome/common/content_settings.h"
 #include "content/public/browser/browser_message_filter.h"
 
 struct ChromeViewHostMsg_GetPluginInfo_Status;
 class GURL;
 class HostContentSettingsMap;
 class PluginFinder;
 class Profile;
 
@@ skipping 43 matching lines @@
    private:
     int render_process_id_;
     content::ResourceContext* resource_context_;
     const HostContentSettingsMap* host_content_settings_map_;
 
     BooleanPrefMember allow_outdated_plugins_;
     BooleanPrefMember always_authorize_plugins_;
   };
 
   PluginInfoMessageFilter(int render_process_id, Profile* profile);
-  virtual ~PluginInfoMessageFilter();
 
   // content::BrowserMessageFilter methods:
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
   virtual void OnDestruct() const OVERRIDE;
 
  private:
+  friend struct content::BrowserThread::DeleteOnThread<
+      content::BrowserThread::UI>;
+  friend class base::DeleteHelper<PluginInfoMessageFilter>;
+
+  virtual ~PluginInfoMessageFilter();
+
   void OnGetPluginInfo(int render_view_id,
                        const GURL& url,
                        const GURL& top_origin_url,
                        const std::string& mime_type,
                        IPC::Message* reply_msg);
 
   // |params| wraps the parameters passed to |OnGetPluginInfo|, because
   // |base::Bind| doesn't support the required arity <http://crbug.com/98542>.
   void PluginsLoaded(const GetPluginInfo_Params& params,
                      IPC::Message* reply_msg,
                      const std::vector<webkit::WebPluginInfo>& plugins);
 
   void GotPluginFinder(const GetPluginInfo_Params& params,
                        IPC::Message* reply_msg,
                        const webkit::WebPluginInfo& plugin,
                        const std::string& actual_mime_type,
                        PluginFinder* plugin_finder);
 
   Context context_;
 
   base::WeakPtrFactory<PluginInfoMessageFilter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInfoMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_PLUGIN_INFO_MESSAGE_FILTER_H_