GTTF: Add missing virtual destructors.

chrome/browser/tab_contents/render_view_context_menu.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_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_
 #define CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 105 matching lines @@
   // Update the status and text of the specified context-menu item.
   virtual void UpdateMenuItem(int command_id,
                               bool enabled,
                               bool hidden,
                               const string16& title) = 0;
 
   // Retrieve the given associated objects with a context menu.
   virtual content::RenderViewHost* GetRenderViewHost() const = 0;
   virtual content::WebContents* GetWebContents() const = 0;
   virtual Profile* GetProfile() const = 0;
+
+ protected:
+  virtual ~RenderViewContextMenuProxy() { }
 };
 
 class RenderViewContextMenu : public ui::SimpleMenuModel::Delegate,
                               public RenderViewContextMenuProxy {
  public:
   static const size_t kMaxSelectionTextLength;
 
   RenderViewContextMenu(content::WebContents* web_contents,
                         const content::ContextMenuParams& params);
 
@@ skipping 139 matching lines @@
   // An observer that disables menu items when print preview is active.
   scoped_ptr<PrintPreviewContextMenuObserver> print_preview_menu_observer_;
 
   // Our observers.
   mutable ObserverList<RenderViewContextMenuObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewContextMenu);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_CONTEXT_MENU_H_