Add undeclared virtual destructors part 2...

views/views_delegate.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 VIEWS_VIEWS_DELEGATE_H_
 #define VIEWS_VIEWS_DELEGATE_H_
 
 #include <string>
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 class Clipboard;
 namespace gfx {
 class Rect;
 }
 
 namespace views {
 
 // ViewsDelegate is an interface implemented by an object using the views
 // framework. It is used to obtain various high level application utilities
 // and perform some actions such as window placement saving.
 //
 // The embedding app must set views_delegate to assign its ViewsDelegate
 // implementation.
 class ViewsDelegate {
  public:
+  virtual ~ViewsDelegate() {}
+
   // Gets the clipboard.
   virtual Clipboard* GetClipboard() const = 0;
 
   // Saves the position, size and maximized state for the window with the
   // specified name.
   virtual void SaveWindowPlacement(const std::wstring& window_name,
                                    const gfx::Rect& bounds,
                                    bool maximized) = 0;
 
   // Retrieves the saved position and size for the window with the specified
@@ skipping 16 matching lines @@
   virtual void AddRef() = 0;
   virtual void ReleaseRef() = 0;
 
   // The active ViewsDelegate used by the views system.
   static ViewsDelegate* views_delegate;
 };
 
 }  // namespace views
 
 #endif  // #ifndef VIEWS_VIEWS_DELEGATE_H_