Make Widget ownership a little clearer by expressing it in terms of an enum.

views/widget/native_widget_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_WIDGET_NATIVE_WIDGET_WIN_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
 #pragma once
 
 #include <atlbase.h>
 #include <atlapp.h>
@@ skipping 457 matching lines @@
   // information from GetUpdateRect()).
   // We also need to keep track of the invalid rectangle for the RootView should
   // we need to paint the non-client area. The data supplied to WM_NCPAINT seems
   // to be insufficient.
   gfx::Rect invalid_rect_;
 
   // A factory that allows us to schedule a redraw for layered windows.
   ScopedRunnableMethodFactory<NativeWidgetWin> paint_layered_window_factory_;
 
   // See class documentation for Widget in widget.h for a note about ownership.
-  bool delete_on_destroy_;
+  Widget::InitParams::Ownership ownership_;
 
   // True if we are allowed to update the layered window from the DIB backing
   // store if necessary.
   bool can_update_layered_window_;
 
   // Whether the focus should be restored next time we get enabled.  Needed to
   // restore focus correctly when Windows modal dialogs are displayed.
   bool restore_focus_when_enabled_;
 
   // Instance of accessibility information and handling for MSAA root
@@ skipping 23 matching lines @@
 
   // Indicates if the |input_method_| is an InputMethodWin instance.
   bool is_input_method_win_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetWin);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_