Allow the Views Delegate to provide the native widget.

ui/views/widget/desktop_native_widget_aura.h

 // Copyright (c) 2012 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 UI_VIEWS_WIDGET_DESKTOP_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_DESKTOP_NATIVE_WIDGET_AURA_H_
 
 #include "ui/aura/window_delegate.h"
 #include "ui/views/widget/native_widget_private.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 
 class DesktopRootWindowHost;
 
 class VIEWS_EXPORT DesktopNativeWidgetAura
     : public internal::NativeWidgetPrivate,
       public aura::WindowDelegate {
  public:
   explicit DesktopNativeWidgetAura(internal::NativeWidgetDelegate* delegate);
   virtual ~DesktopNativeWidgetAura();
 
- private:
+ protected:
   // Overridden from internal::NativeWidgetPrivate:
   virtual void InitNativeWidget(const Widget::InitParams& params) OVERRIDE;
   virtual NonClientFrameView* CreateNonClientFrameView() OVERRIDE;
   virtual bool ShouldUseNativeFrame() const OVERRIDE;
   virtual void FrameTypeChanged() OVERRIDE;
   virtual Widget* GetWidget() OVERRIDE;
   virtual const Widget* GetWidget() const OVERRIDE;
   virtual gfx::NativeView GetNativeView() const OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() const OVERRIDE;
   virtual Widget* GetTopLevelWidget() OVERRIDE;
@@ skipping 94 matching lines @@
   virtual bool HasHitTestMask() const OVERRIDE;
   virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
   virtual scoped_refptr<ui::Texture> CopyTexture() OVERRIDE;
 
   // Overridden from ui::EventHandler:
   virtual ui::EventResult OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual ui::EventResult OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
   virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
+ private:
   scoped_ptr<DesktopRootWindowHost> desktop_root_window_host_;
   aura::Window* window_;
   Widget::InitParams::Ownership ownership_;
   internal::NativeWidgetDelegate* native_widget_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopNativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_NATIVE_WIDGET_AURA_H_