Rework the way Widget::Init works:

views/controls/menu/menu_host_gtk.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_GTK_H_
 #define VIEWS_CONTROLS_MENU_MENU_HOST_GTK_H_
 #pragma once
 
 #include "views/controls/menu/native_menu_host.h"
 #include "views/widget/widget_gtk.h"
 
 namespace views {
 namespace internal {
 class NativeMenuHostDelegate;
 }
 
 // NativeMenuHost implementation for Gtk.
 class MenuHostGtk : public WidgetGtk,
                     public NativeMenuHost {
  public:
   explicit MenuHostGtk(internal::NativeMenuHostDelegate* delegate);
   virtual ~MenuHostGtk();
 
  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 WidgetGtk:
+  virtual void InitNativeWidget(const Widget::CreateParams& params) OVERRIDE;
   virtual RootView* CreateRootView() OVERRIDE;
   virtual bool ShouldReleaseCaptureOnMouseReleased() const OVERRIDE;
   virtual void ReleaseMouseCapture() OVERRIDE;
   virtual void OnDestroy(GtkWidget* object) OVERRIDE;
   virtual void HandleGtkGrabBroke() OVERRIDE;
   virtual void HandleXGrabBroke() OVERRIDE;
 
   // Have we done input grab?
   bool did_input_grab_;
 
   scoped_ptr<internal::NativeMenuHostDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuHostGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_HOST_GTK_H_