Fix showing the sibling menu on mouse move

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 <stdint.h>
 
 #include <map>
@@ skipping 245 matching lines @@
   bool ContainsPointInRoot(const gfx::Point& point_in_root) const;
 
   // Returns true if relative-to-this-Window's-origin |local_point| falls
   // within this Window's bounds.
   bool ContainsPoint(const gfx::Point& local_point) const;
 
   // Returns the Window that most closely encloses |local_point| for the
   // purposes of event targeting.
   Window* GetEventHandlerForPoint(const gfx::Point& local_point);
 
-  // Returns the topmost Window with a delegate containing |local_point|.
-  Window* GetTopWindowContainingPoint(const gfx::Point& local_point);
-
   // Returns this window's toplevel window (the highest-up-the-tree ancestor
   // that has a delegate set).  The toplevel window may be |this|.
   Window* GetToplevelWindow();
 
   // Claims focus.
   void Focus();
 
   // Returns true if the Window is currently the focused window.
   bool HasFocus() const;
 
@@ skipping 210 matching lines @@
   gfx::Insets hit_test_bounds_override_inner_;
 
   base::ObserverList<WindowObserver, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_