Delete ash-based code for Windows drag-and-drop graphics.

ui/views/button_drag_utils.cc

 // 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.
 
 #include "ui/views/button_drag_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
-#include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/canvas_painter.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/image/image.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
@@ skipping 61 matching lines @@
   if (press_pt)
     press_point = press_pt->OffsetFromOrigin();
   else
     press_point = gfx::Vector2d(size.width() / 2, size.height() / 2);
 
   SkBitmap bitmap;
   float raster_scale = ScaleFactorForDragFromWidget(&widget);
   SkColor color = SK_ColorTRANSPARENT;
   button.Paint(ui::CanvasPainter(&bitmap, size, raster_scale, color).context());
   gfx::ImageSkia image(gfx::ImageSkiaRep(bitmap, raster_scale));
-  drag_utils::SetDragImageOnDataObject(image, press_point, data);
+  data->provider().SetDragImage(image, press_point);
 }
 
 }  // namespace button_drag_utils