aura: Draw drop shadows under browsers and menus.

ui/aura/window.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 270 matching lines @@
   // Gets a Window (either this one or a subwindow) containing |local_point|.
   // If |return_tightest| is true, returns the tightest-containing (i.e.
   // furthest down the hierarchy) Window containing the point; otherwise,
   // returns the loosest.  If |for_event_handling| is true, then hit-test masks
   // and StopsEventPropagation() are honored; otherwise, only bounds checks are
   // performed.
   Window* GetWindowForPoint(const gfx::Point& local_point,
                             bool return_tightest,
                             bool for_event_handling);
 
+  // Called when this window's parent has changed.
+  void OnParentChanged();
+
+  // Called when this window's stacking order among its siblings is changed.
+  void OnStackingChanged();
+
   // Overridden from ui::LayerDelegate:
   virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
 
   WindowType type_;
 
   WindowDelegate* delegate_;
 
   scoped_ptr<ui::Layer> layer_;
 
   // The Window's parent.
@@ skipping 32 matching lines @@
   // TODO(oshima): Consolidcate ViewProp and aura::window property
   // implementation.
   std::map<const char*, void*> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_