ui: Remove SkCanvas methods from drag utils.

ui/base/dragdrop/drag_utils.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_BASE_DRAGDROP_DRAG_UTILS_H_
 #define UI_BASE_DRAGDROP_DRAG_UTILS_H_
 
-#include <string>
-
-#include "base/files/file_path.h"
 #include "ui/base/ui_base_export.h"
 
 namespace gfx {
-class Canvas;
 class ImageSkia;
 class Vector2d;
 }
 
 namespace ui {
 class OSExchangeData;
 }
 
 namespace drag_utils {
 
-// Sets the drag image on data_object from the supplied canvas.
-// |cursor_offset| gives the location of the hotspot for the drag image.
-UI_BASE_EXPORT void SetDragImageOnDataObject(const gfx::Canvas& canvas,
-                                             const gfx::Vector2d& cursor_offset,
-                                             ui::OSExchangeData* data_object);
-
 // Sets the drag image on data_object from the supplied ImageSkia.
 // |cursor_offset| gives the location of the hotspot for the drag image.
 UI_BASE_EXPORT void SetDragImageOnDataObject(const gfx::ImageSkia& image_skia,
                                              const gfx::Vector2d& cursor_offset,
                                              ui::OSExchangeData* data_object);
 
 }  // namespace drag_utils
 
 #endif  // UI_BASE_DRAGDROP_DRAG_UTILS_H_