Rework the way Widget::Init works:

views/window/window_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_WINDOW_WINDOW_WIN_H_
 #define VIEWS_WINDOW_WINDOW_WIN_H_
 #pragma once
 
 #include "views/widget/widget_win.h"
 #include "views/window/native_window.h"
@@ skipping 54 matching lines @@
 
   // Returns the system set window title font.
   static gfx::Font GetWindowTitleFont();
 
  protected:
   friend Window;
 
   // Constructs the WindowWin. |window_delegate| cannot be NULL.
   explicit WindowWin(WindowDelegate* window_delegate);
 
-  // Create the Window.
-  // If parent is NULL, this WindowWin is top level on the desktop.
-  // If |bounds| is empty, the view is queried for its preferred size and
-  // centered on screen.
-  virtual void Init(gfx::NativeView parent, const gfx::Rect& bounds) OVERRIDE;
-
   // Returns the insets of the client area relative to the non-client area of
   // the window. Override this function instead of OnNCCalcSize, which is
   // crazily complicated.
   virtual gfx::Insets GetClientAreaInsets() const;
 
   // Retrieve the show state of the window. This is one of the SW_SHOW* flags
   // passed into Windows' ShowWindow method. For normal windows this defaults
   // to SW_SHOWNORMAL, however windows (e.g. the main window) can override this
   // method to provide different values (e.g. retrieve the user's specified
   // show state from the shortcut starutp info).
   virtual int GetShowState() const;
 
   // Overridden from WidgetWin:
+  virtual void InitNativeWidget(const Widget::CreateParams& params) OVERRIDE;
   virtual void OnActivateApp(BOOL active, DWORD thread_id) OVERRIDE;
   virtual LRESULT OnAppCommand(HWND window,
                                short app_command,
                                WORD device,
                                int keystate) OVERRIDE;
   virtual void OnClose() OVERRIDE;
   virtual void OnCommand(UINT notification_code,
                          int command_id,
                          HWND window) OVERRIDE;
   virtual void OnDestroy() OVERRIDE;
@@ skipping 177 matching lines @@
 
   // True when the window is being moved/sized.
   bool is_in_size_move_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowWin);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WINDOW_WINDOW_WIN_H_