Reorder the NativeViews attached to a view via kViewHostKey according to the position of the view

ui/views/widget/native_widget_private.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_PRIVATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 
 #include "base/string16.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 82 matching lines @@
   virtual Widget* GetTopLevelWidget() = 0;
 
   // Returns the Compositor, or NULL if there isn't one associated with this
   // NativeWidget.
   virtual const ui::Compositor* GetCompositor() const = 0;
   virtual ui::Compositor* GetCompositor() = 0;
 
   // Returns the NativeWidget's layer, if any.
   virtual ui::Layer* GetLayer() = 0;
 
+  // Reorders the widget's child NativeViews which are associated to the view
+  // tree (eg via a NativeViewHost) to match the z-order of the views in the
+  // view tree. The z-order of views with layers relative to views with
+  // associated NativeViews is used to reorder the NativeView layers. This
+  // method assumes that the widget's child layers which are owned by a view are
+  // already in the correct z-order relative to each other and does no
+  // reordering if there are no views with an associated NativeView.
+  virtual void ReorderNativeViews() = 0;
+
   // Notifies the NativeWidget that a view was removed from the Widget's view
   // hierarchy.
   virtual void ViewRemoved(View* view) = 0;
 
   // Sets/Gets a native window property on the underlying native window object.
   // Returns NULL if the property does not exist. Setting the property value to
   // NULL removes the property.
   virtual void SetNativeWindowProperty(const char* name, void* value) = 0;
   virtual void* GetNativeWindowProperty(const char* name) const = 0;
 
@@ skipping 92 matching lines @@
   virtual ui::NativeTheme* GetNativeTheme() const = 0;
 
   // Overridden from NativeWidget:
   virtual internal::NativeWidgetPrivate* AsNativeWidgetPrivate() OVERRIDE;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_