InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/canvas/CanvasStyle.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 127 matching lines @@
         break;
     case Gradient:
         context->setFillGradient(canvasGradient()->gradient());
         break;
     case ImagePattern:
         context->setFillPattern(canvasPattern()->pattern());
         break;
     }
 }
 
-void CanvasStyle::trace(Visitor* visitor)
+DEFINE_TRACE(CanvasStyle)
 {
     visitor->trace(m_gradient);
     visitor->trace(m_pattern);
 }
 
 }