RefCounted types should not have public destructors, chrome/browser/extensions

chrome/browser/extensions/execute_code_in_tab_function.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_EXTENSIONS_EXECUTE_CODE_IN_TAB_FUNCTION_H__
 #define CHROME_BROWSER_EXTENSIONS_EXECUTE_CODE_IN_TAB_FUNCTION_H__
 #pragma once
 
 #include <string>
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "chrome/common/extensions/user_script.h"
 #include "content/public/browser/web_contents_observer.h"
 
 // Implement API call tabs.executeScript and tabs.insertCSS.
 class ExecuteCodeInTabFunction : public AsyncExtensionFunction,
                                  public content::WebContentsObserver {
  public:
   ExecuteCodeInTabFunction();
+
+ protected:
   virtual ~ExecuteCodeInTabFunction();
 
- private:
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
+ private:
   // content::WebContentsObserver overrides.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // Message handler.
   void OnExecuteCodeFinished(int request_id, bool success,
                              const std::string& error);
 
   // Called when contents from the file whose path is specified in JSON
   // arguments has been loaded.
   void DidLoadFile(bool success, const std::string& data);
@@ skipping 22 matching lines @@
 
   // If all_frames_ is true, script or CSS text would be injected
   // to all frames; Otherwise only injected to top main frame.
   bool all_frames_;
 
   // The intended time to run the script.
   UserScript::RunLocation run_at_;
 };
 
 class TabsExecuteScriptFunction : public ExecuteCodeInTabFunction {
+ private:
+  virtual ~TabsExecuteScriptFunction() {}
+
   DECLARE_EXTENSION_FUNCTION_NAME("tabs.executeScript")
 };
 
 class TabsInsertCSSFunction : public ExecuteCodeInTabFunction {
+ private:
+  virtual ~TabsInsertCSSFunction() {}
+
   DECLARE_EXTENSION_FUNCTION_NAME("tabs.insertCSS")
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXECUTE_CODE_IN_TAB_FUNCTION_H__