Add MenuModelAdapter to wrap ui::MenuModel with views::MenuDelegate interface.

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_
 #pragma once
 
 #include <string>
 #if defined(OS_WIN)
@@ skipping 62 matching lines @@
 #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;
 
+  // Converts views::Event::flags to a WindowOpenDisposition.
+  virtual int GetDispositionForEvent(int event_flags) = 0;
+
   // The active ViewsDelegate used by the views system.
   static ViewsDelegate* views_delegate;
 };
 
 }  // namespace views
 
 #endif  // VIEWS_VIEWS_DELEGATE_H_