ui/gfx: Make gfx::Canvas inherit from gfx::CanvasSkia.

ui/base/dragdrop/drag_utils.cc

 // Copyright (c) 2011 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/base/dragdrop/drag_utils.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/size.h"
 
 namespace drag_utils {
 
 // Maximum width of the link drag image in pixels.
 static const int kLinkDragImageVPadding = 3;
 
@@ skipping 31 matching lines @@
   canvas.DrawStringInt(name, font, kFileDragImageTextColor,
                        0, icon->height() + kLinkDragImageVPadding,
                        width, font.GetHeight(), gfx::Canvas::TEXT_ALIGN_CENTER);
 #endif
 
   SetDragImageOnDataObject(canvas, gfx::Size(width, height),
                            gfx::Point(width / 2, kLinkDragImageVPadding),
                            data_object);
 }
 
-void SetDragImageOnDataObject(const gfx::Canvas& canvas,
+void SetDragImageOnDataObject(const gfx::CanvasSkia& canvas,

[Ben Goodger (Google), 2012/03/06 15:46:58]

????

[tfarina, 2012/03/06 17:09:09]

Done.

                               const gfx::Size& size,
                               const gfx::Point& cursor_offset,
                               ui::OSExchangeData* data_object) {
   SetDragImageOnDataObject(
-      canvas.AsCanvasSkia()->ExtractBitmap(), size, cursor_offset, data_object);
+      canvas.ExtractBitmap(), size, cursor_offset, data_object);
 }
 
 }  // namespace drag_utils