Fixes possible crash if the window hosting a menu was closed while the

views/views_delegate.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved. Use of this
+// 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
@@ skipping 30 matching lines @@
   // Retrieves the saved maximized state for the window with the specified
   // name.
   virtual bool GetSavedMaximizedState(const std::wstring& window_name,
                                       bool* maximized) const = 0;
 
 #if defined(OS_WIN)
   // Retrieves the default window icon to use for windows if none is specified.
   virtual HICON GetDefaultWindowIcon() const = 0;
 #endif
 
+  // AddRef/ReleaseRef are invoked while a menu is visible. They are used to
+  // ensure we don't attempt to exit while a menu is showing.
+  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_