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

ui/views/drag_utils.cc

Index: ui/views/drag_utils.cc
diff --git a/ui/views/drag_utils.cc b/ui/views/drag_utils.cc
index ae2a3e9ae54b0ea26c77e783dd76a85533449325..c66b35237eae02b7f0a75b89c30eea8c1f19d0d5 100644
--- a/ui/views/drag_utils.cc
+++ b/ui/views/drag_utils.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -94,8 +94,8 @@ void SetDragImageOnDataObject(const gfx::Canvas& canvas,
                               const gfx::Size& size,
                               const gfx::Point& cursor_offset,
                               ui::OSExchangeData* data_object) {
-  SetDragImageOnDataObject(
-      canvas.AsCanvasSkia()->ExtractBitmap(), size, cursor_offset, data_object);
+  SetDragImageOnDataObject(canvas.ExtractBitmap(), size, cursor_offset,
+                           data_object);
 }
 
 }  // namespace drag_utils