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 83 matching lines @@
 
   // 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;
 
   // See description in View for details.
   virtual gfx::Vector2d CalculateOffsetToAncestorWithLayer(
       ui::Layer** layer_parent) = 0;
 
+  // Reorder the child layers of the widget's layer so that their order matches
+  // the order of views with layers / views with attached layers in the view
+  // hierarchy.
+  virtual void ReorderLayers() = 0;
+
+  // Returns true if a child NativeView is attached to one of the widget's
+  // views.
+  virtual bool HasNativeViewAttachedToViewTree() const = 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_