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

ui/aura/window.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_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 157 matching lines @@
                                     const gfx::Rect& bounds_in_screen);
 
   // Stacks the specified child of this Window at the front of the z-order.
   void StackChildAtTop(Window* child);
 
   // Stacks |child| above |target|.  Does nothing if |child| is already above
   // |target|.  Does not stack on top of windows with NULL layer delegates,
   // see WindowTest.StackingMadrigal for details.
   void StackChildAbove(Window* child, Window* target);
 
+  // Stacks the specified child of this window at the bottom of the z-order.
+  void StackChildAtBottom(Window* child);
+
   // Stacks |child| below |target|. Does nothing if |child| is already below
   // |target|.
   void StackChildBelow(Window* child, Window* target);
 
   // Tree operations.
   void AddChild(Window* child);
   void RemoveChild(Window* child);
 
   const Windows& children() const { return children_; }
 
@@ skipping 328 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_