Fix showing the sibling menu on mouse move

ui/aura/window.h

Index: ui/aura/window.h
diff --git a/ui/aura/window.h b/ui/aura/window.h
index bfbe7d3dcf06aa9ff7e23e087b80c06481f401d5..2996584fb7ebf93febaafaa61b5ce84bd3896514 100644
--- a/ui/aura/window.h
+++ b/ui/aura/window.h
@@ -263,9 +263,6 @@ class AURA_EXPORT Window : public ui::LayerDelegate,
   // 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();