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

chrome/browser/extensions/extension_content_settings_api.h

 // Copyright (c) 2011 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_CONTENT_SETTINGS_API_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_CONTENT_SETTINGS_API_H__
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 
 namespace webkit {
 namespace npapi {
 class PluginGroup;
 }
 }
 
 class ClearContentSettingsFunction : public SyncExtensionFunction {
  public:
+  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.clear")
+
+ protected:
+  virtual ~ClearContentSettingsFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.clear")
 };
 
 class GetContentSettingFunction : public SyncExtensionFunction {
  public:
+  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.get")
+
+ protected:
+  virtual ~GetContentSettingFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.get")
 };
 
 class SetContentSettingFunction : public SyncExtensionFunction {
  public:
+  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.set")
+
+ protected:
+  virtual ~SetContentSettingFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.set")
 };
 
 class GetResourceIdentifiersFunction : public AsyncExtensionFunction {
  public:
+  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.getResourceIdentifiers")
+
+ protected:
+  virtual ~GetResourceIdentifiersFunction() {}
+
+  // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("contentSettings.getResourceIdentifiers")
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ExtensionApiTest,
                            ContentSettingsGetResourceIdentifiers);
 
   void OnGotPluginGroups(const std::vector<webkit::npapi::PluginGroup>& groups);
 
   // Used to override the global plugin list in tests.
   static void SetPluginGroupsForTesting(
       const std::vector<webkit::npapi::PluginGroup>* plugin_groups);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_CONTENT_SETTINGS_API_H__