Virtual destructors should have virtual keyword.

chrome/browser/extensions/extension_browser_actions_api.h

 // Copyright (c) 2010 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_BROWSER_ACTIONS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_ACTIONS_API_H_
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/extensions/extension_action.h"
@@ skipping 19 matching lines @@
   // The tab id the browser action function should apply to, if any, or
   // kDefaultTabId if none was specified.
   int tab_id_;
 
   // The browser action for the current extension.
   ExtensionAction* browser_action_;
 };
 
 // Implement chrome.browserAction.setIcon().
 class BrowserActionSetIconFunction : public BrowserActionFunction {
-  ~BrowserActionSetIconFunction() {}
+  virtual ~BrowserActionSetIconFunction() {}
   virtual bool RunBrowserAction();
   DECLARE_EXTENSION_FUNCTION_NAME("browserAction.setIcon")
 };
 
 // Implement chrome.browserAction.setTitle().
 class BrowserActionSetTitleFunction : public BrowserActionFunction {
-  ~BrowserActionSetTitleFunction() {}
+  virtual ~BrowserActionSetTitleFunction() {}
   virtual bool RunBrowserAction();
   DECLARE_EXTENSION_FUNCTION_NAME("browserAction.setTitle")
 };
 
 // Implement chrome.browserActions.setPopup().
 class BrowserActionSetPopupFunction : public BrowserActionFunction {
-  ~BrowserActionSetPopupFunction() {}
+  virtual ~BrowserActionSetPopupFunction() {}
   virtual bool RunBrowserAction();
   DECLARE_EXTENSION_FUNCTION_NAME("browserAction.setPopup")
 };
 
 // Implement chrome.browserAction.setBadgeText().
 class BrowserActionSetBadgeTextFunction : public BrowserActionFunction {
-  ~BrowserActionSetBadgeTextFunction() {}
+  virtual ~BrowserActionSetBadgeTextFunction() {}
   virtual bool RunBrowserAction();
   DECLARE_EXTENSION_FUNCTION_NAME("browserAction.setBadgeText")
 };
 
 // Implement chrome.browserAction.setBadgeBackgroundColor().
 class BrowserActionSetBadgeBackgroundColorFunction
     : public BrowserActionFunction {
-  ~BrowserActionSetBadgeBackgroundColorFunction() {}
+  virtual ~BrowserActionSetBadgeBackgroundColorFunction() {}
   virtual bool RunBrowserAction();
   DECLARE_EXTENSION_FUNCTION_NAME("browserAction.setBadgeBackgroundColor")
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_ACTIONS_API_H_