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

chrome/browser/extensions/extension_module.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_EXTENSION_MODULE_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_MODULE_H__
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 
 class ExtensionPrefs;
 
 class SetUpdateUrlDataFunction : public SyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("extension.setUpdateUrlData");
+
  protected:
+  virtual ~SetUpdateUrlDataFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("extension.setUpdateUrlData");
 
  private:
   ExtensionPrefs* extension_prefs();
 };
 
 class IsAllowedIncognitoAccessFunction : public SyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("extension.isAllowedIncognitoAccess");
+
  protected:
+  virtual ~IsAllowedIncognitoAccessFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("extension.isAllowedIncognitoAccess");
 };
 
 class IsAllowedFileSchemeAccessFunction : public SyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("extension.isAllowedFileSchemeAccess");
+
  protected:
+  virtual ~IsAllowedFileSchemeAccessFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("extension.isAllowedFileSchemeAccess");
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_MODULE_H__