Replace RenderArena with PartitionAlloc.

Source/core/svg/SVGLinearGradientElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 95 matching lines @@
     }
 
     SVGElementInstance::InvalidationGuard invalidationGuard(this);
     
     updateRelativeLengthsInformation();
 
     if (RenderObject* object = renderer())
         object->setNeedsLayout(true);
 }
 
-RenderObject* SVGLinearGradientElement::createRenderer(RenderArena* arena, RenderStyle*)
+RenderObject* SVGLinearGradientElement::createRenderer(RenderStyle*)
 {
-    return new (arena) RenderSVGResourceLinearGradient(this);
+    return new RenderSVGResourceLinearGradient(this);
 }
 
 bool SVGLinearGradientElement::collectGradientAttributes(LinearGradientAttributes& attributes)
 {
     HashSet<SVGGradientElement*> processedGradients;
 
     bool isLinear = true;
     SVGGradientElement* current = this;
 
     while (current) {
@@ skipping 57 matching lines @@
 
 bool SVGLinearGradientElement::selfHasRelativeLengths() const
 {
     return x1().isRelative()
         || y1().isRelative()
         || x2().isRelative()
         || y2().isRelative();
 }
 
 }