Allow CanvasSkia to bind to an existing SkCanvas.

views/desktop/desktop_background.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 "views/desktop/desktop_background.h"
 
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/path.h"
 #include "views/view.h"
 
@@ skipping 19 matching lines @@
     gfx::Path path;
     path.moveTo(0, view->height() / 2);
     path.cubicTo(view->height() / 4, view->height() / 4,
         view->height() / 2, view->height() / 2,
         SkIntToScalar(view->width()), view->height() / 2);
     path.lineTo(SkIntToScalar(view->width()), SkIntToScalar(view->height()));
     path.lineTo(0, SkIntToScalar(view->height()));
     path.close();
 
     paint.setColor(SK_ColorGREEN);
-    canvas->AsCanvasSkia()->drawPath(path, paint);
+    canvas->GetSkCanvas()->drawPath(path, paint);
   }
 
   // Paint the shining sun.
   {
     gfx::Path path;
     path.addCircle(view->height() / 4, view->height() / 8, view->height() / 16);
     path.close();
 
     paint.setColor(SK_ColorYELLOW);
-    canvas->AsCanvasSkia()->drawPath(path, paint);
+    canvas->GetSkCanvas()->drawPath(path, paint);
   }
 }
 
 }  // namespace desktop
 }  // namespace views