Revert of Move GetCursor() method from WindowDelegate to its own delegate interface CursorDelegate.

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 199 matching lines @@
   static void ConvertPointToTarget(const Window* source,
                                    const Window* target,
                                    gfx::Point* point);
   static void ConvertRectToTarget(const Window* source,
                                   const Window* target,
                                   gfx::Rect* rect);
 
   // Moves the cursor to the specified location relative to the window.
   virtual void MoveCursorTo(const gfx::Point& point_in_window);
 
+  // Returns the cursor for the specified point, in window coordinates.
+  gfx::NativeCursor GetCursor(const gfx::Point& point) const;
+
   // Sets an 'event filter' for the window. An 'event filter' for a Window is
   // a pre-target event handler, where the window owns the handler. A window
   // can have only one such event filter. Setting a new filter removes and
   // destroys any previously installed filter.
   void SetEventFilter(ui::EventHandler* event_filter);
 
   // Add/remove observer.
   void AddObserver(WindowObserver* observer);
   void RemoveObserver(WindowObserver* observer);
   bool HasObserver(WindowObserver* observer);
@@ skipping 309 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_