Rework the way Widget::Init works:

views/controls/menu/menu_host_win.h

 // Copyright (c) 2011 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_CONTROLS_MENU_MENU_HOST_WIN_H_
 #define VIEWS_CONTROLS_MENU_MENU_HOST_WIN_H_
 #pragma once
 
 #include "views/controls/menu/native_menu_host.h"
 #include "views/widget/widget_win.h"
 
 namespace views {
 namespace internal {
 class NativeMenuHostDelegate;
 }
 
 // MenuHost implementation for windows.
 class MenuHostWin : public WidgetWin,
                     public NativeMenuHost {
  public:
   explicit MenuHostWin(internal::NativeMenuHostDelegate* delegate);
   virtual ~MenuHostWin();
 
  private:
   // Overridden from NativeMenuHost:
-  virtual void InitMenuHost(gfx::NativeWindow parent,
-                            const gfx::Rect& bounds) OVERRIDE;
   virtual void StartCapturing() OVERRIDE;
   virtual NativeWidget* AsNativeWidget() OVERRIDE;
 
   // Overridden from WidgetWin:
   virtual void OnDestroy() OVERRIDE;
   virtual void OnCancelMode() OVERRIDE;
   virtual RootView* CreateRootView() OVERRIDE;
   virtual bool ShouldReleaseCaptureOnMouseReleased() const OVERRIDE;
 
   scoped_ptr<internal::NativeMenuHostDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuHostWin);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_HOST_WIN_H_