add 'slow' prefix to RenderObject's firstChild() / lastChild() methods

Source/core/rendering/svg/SVGRenderTreeAsText.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2009 Apple Inc. All rights reserved.
  *           (C) 2005 Rob Buis <buis@kde.org>
  *           (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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 455 matching lines @@
 {
     writeIndent(ts, indent);
     ts << object.renderName();
 
     if (object.node())
         ts << " {" << object.node()->nodeName() << "}";
 }
 
 static void writeChildren(TextStream& ts, const RenderObject& object, int indent)
 {
-    for (RenderObject* child = object.firstChild(); child; child = child->nextSibling())
+    for (RenderObject* child = object.slowFirstChild(); child; child = child->nextSibling())
         write(ts, *child, indent + 1);
 }
 
 static inline void writeCommonGradientProperties(TextStream& ts, SVGSpreadMethodType spreadMethod, const AffineTransform& gradientTransform, SVGUnitTypes::SVGUnitType gradientUnits)
 {
     writeNameValuePair(ts, "gradientUnits", gradientUnits);
 
     if (spreadMethod != SVGSpreadMethodPad)
         ts << " [spreadMethod=" << spreadMethod << "]";
 
@@ skipping 186 matching lines @@
             ts << " ";
             writeNameAndQuotedValue(ts, "filter", svgStyle->filterResource());
             ts << " ";
             writeStandardPrefix(ts, *filter, 0);
             ts << " " << filter->resourceBoundingBox(&renderer) << "\n";
         }
     }
 }
 
 } // namespace WebCore