Make NativeControl inherit from base::WindowImpl instead of CWindowImpl to re...

base/window_impl.h

 // Copyright (c) 2009 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 BASE_WINDOW_IMPL_H_
 #define BASE_WINDOW_IMPL_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlmisc.h>
@@ skipping 32 matching lines @@
  public:
   WindowImpl();
   virtual ~WindowImpl();
 
   // Initializes the Window with a parent and an initial desired size.
   void Init(HWND parent, const gfx::Rect& bounds);
 
   // Retrieves the default window icon to use for windows if none is specified.
   virtual HICON GetDefaultWindowIcon() const;
 
+  // Override this to be notified of the last message.
+  virtual void OnFinalMessage(HWND window) {}
+
   // Returns the HWND associated with this Window.
   HWND hwnd() const { return hwnd_; }
 
   // Sets the window styles. This is ONLY used when the window is created.
   // In other words, if you invoke this after invoking Init, nothing happens.
   void set_window_style(DWORD style) { window_style_ = style; }
   DWORD window_style() const { return window_style_; }
 
   // Sets the extended window styles. See comment about |set_window_style|.
   void set_window_ex_style(DWORD style) { window_ex_style_ = style; }
@@ skipping 38 matching lines @@
 
   // Our hwnd.
   HWND hwnd_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowImpl);
 };
 
 }  // namespace base
 
 #endif  // BASE_WINDOW_IMPL_H_