Refine toRenderSVGResourceContainer()

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 49 matching lines @@
 #include "core/svg/SVGPathElement.h"
 #include "core/svg/SVGPathUtilities.h"
 #include "core/svg/SVGPatternElement.h"
 #include "core/svg/SVGPointList.h"
 #include "core/svg/SVGPolyElement.h"
 #include "core/svg/SVGRadialGradientElement.h"
 #include "core/svg/SVGRectElement.h"
 #include "core/svg/SVGStopElement.h"
 
 #include <math.h>
+#include <memory>
 
 namespace WebCore {
 
 /** class + iomanip to help streaming list separators, i.e. ", " in string "a, b, c, d"
  * Can be used in cases where you don't know which item in the list is the first
  * one to be printed, but still want to avoid strings like ", b, c".
  */
 class TextStreamSeparator {
 public:
     TextStreamSeparator(const String& s)
@@ skipping 396 matching lines @@
 }
 
 void writeSVGResourceContainer(TextStream& ts, const RenderObject& object, int indent)
 {
     writeStandardPrefix(ts, object, indent);
 
     Element* element = toElement(object.node());
     const AtomicString& id = element->getIdAttribute();
     writeNameAndQuotedValue(ts, "id", id);
 
-    RenderSVGResourceContainer* resource = const_cast<RenderObject&>(object).toRenderSVGResourceContainer();
+    RenderSVGResourceContainer* resource = toRenderSVGResourceContainer(const_cast<RenderObject*>(&object));
     ASSERT(resource);
 
     if (resource->resourceType() == MaskerResourceType) {
         RenderSVGResourceMasker* masker = toRenderSVGResourceMasker(resource);
         writeNameValuePair(ts, "maskUnits", masker->maskUnits());
         writeNameValuePair(ts, "maskContentUnits", masker->maskContentUnits());
         ts << "\n";
     } else if (resource->resourceType() == FilterResourceType) {
         RenderSVGResourceFilter* filter = toRenderSVGResourceFilter(resource);
         writeNameValuePair(ts, "filterUnits", filter->filterUnits());
@@ skipping 162 matching lines @@
             ts << " ";
             writeNameAndQuotedValue(ts, "filter", svgStyle->filterResource());
             ts << " ";
             writeStandardPrefix(ts, *filter, 0);
             ts << " " << filter->resourceBoundingBox(&renderer) << "\n";
         }
     }
 }
 
 } // namespace WebCore