Rework the way Widget::Init works:

views/controls/menu/native_menu_host.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_NATIVE_MENU_HOST_H_
 #define VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_H_
 
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace views {
 class NativeWidget;
 namespace internal {
 class NativeMenuHostDelegate;
 }
 
 class NativeMenuHost {
  public:
   virtual ~NativeMenuHost() {}
 
   static NativeMenuHost* CreateNativeMenuHost(
       internal::NativeMenuHostDelegate* delegate);
 
-  // Initializes and shows the MenuHost.
-  virtual void InitMenuHost(gfx::NativeWindow parent,
-                            const gfx::Rect& bounds) = 0;
-
   // Starts capturing input events.
   virtual void StartCapturing() = 0;
 
   virtual NativeWidget* AsNativeWidget() = 0;
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_H_