Minimal Chrome Frame with Aura.

ui/views/widget/native_widget_delegate.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_NATIVE_WIDGET_DELEGATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 
 #include <vector>
 
 #include "ui/base/events/event_constants.h"
@@ skipping 10 matching lines @@
 class GestureEvent;
 class KeyEvent;
 class Layer;
 class MouseEvent;
 class TouchEvent;
 class ScrollEvent;
 }
 
 namespace views {
 class InputMethod;
+class Widget;
 
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetDelegate
 //
 //  An interface implemented by the object that handles events sent by a
 //  NativeWidget implementation.
 //
 class VIEWS_EXPORT NativeWidgetDelegate {
@@ skipping 92 matching lines @@
 
   //
   virtual Widget* AsWidget() = 0;
   virtual const Widget* AsWidget() const = 0;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_