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

content/browser/web_contents/aura/image_window_delegate.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
 
 #include "content/common/content_export.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/gfx/image/image.h"
@@ skipping 11 matching lines @@
   bool has_image() const { return !image_.IsEmpty(); }
 
  protected:
   virtual ~ImageWindowDelegate();
 
   // Overridden from aura::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(
       aura::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(aura::Window* window) OVERRIDE;
   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
@@ skipping 11 matching lines @@
   // the image size is smaller than the window size, then the delegate paints a
   // white background for the missing regions.
   bool size_mismatch_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageWindowDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_