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

ui/aura/test/test_window_delegate.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_TEST_TEST_WINDOW_DELEGATE_H_
 #define UI_AURA_TEST_TEST_WINDOW_DELEGATE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 28 matching lines @@
   }
 
   // Sets the return value for CanFocus(). Default is true.
   void set_can_focus(bool can_focus) { can_focus_ = can_focus; }
 
   // Overridden from WindowDelegate:
   virtual gfx::Size GetMinimumSize() const OVERRIDE;
   virtual gfx::Size GetMaximumSize() const OVERRIDE;
   virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
                                const gfx::Rect& new_bounds) OVERRIDE;
-  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
   virtual bool ShouldDescendIntoChildForEventHandling(
       Window* child,
       const gfx::Point& location) OVERRIDE;
   virtual bool CanFocus() OVERRIDE;
   virtual void OnCaptureLost() OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void OnWindowDestroying(Window* window) OVERRIDE;
   virtual void OnWindowDestroyed(Window* window) OVERRIDE;
@@ skipping 84 matching lines @@
   int key_release_count_;
   int gesture_count_;
 
   DISALLOW_COPY_AND_ASSIGN(EventCountDelegate);
 };
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_TEST_WINDOW_DELEGATE_H_