Oilpan: revert SVG GC mixin constructor workaround.

Source/core/svg/SVGTests.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 12 matching lines @@
 #include "core/svg/SVGTests.h"
 
 #include "core/SVGNames.h"
 #include "core/dom/DOMImplementation.h"
 #include "core/frame/UseCounter.h"
 #include "core/svg/SVGElement.h"
 #include "platform/Language.h"
 
 namespace blink {
 
-SVGTests::SVGTests()
+SVGTests::SVGTests(SVGElement* contextElement)
+    : m_requiredFeatures(SVGStaticStringList::create(contextElement, SVGNames::requiredFeaturesAttr))
+    , m_requiredExtensions(SVGStaticStringList::create(contextElement, SVGNames::requiredExtensionsAttr))
+    , m_systemLanguage(SVGStaticStringList::create(contextElement, SVGNames::systemLanguageAttr))
 {
-}
-
-void SVGTests::initialize(SVGElement* contextElement)
-{
-    ASSERT(!m_requiredFeatures);
-    ASSERT(!m_requiredExtensions);
-    ASSERT(!m_systemLanguage);
     ASSERT(contextElement);
 
-    m_requiredFeatures = SVGStaticStringList::create(contextElement, SVGNames::requiredFeaturesAttr);
-    m_requiredExtensions = SVGStaticStringList::create(contextElement, SVGNames::requiredExtensionsAttr);
-    m_systemLanguage = SVGStaticStringList::create(contextElement, SVGNames::systemLanguageAttr);
-
     contextElement->addToPropertyMap(m_requiredFeatures);
     contextElement->addToPropertyMap(m_requiredExtensions);
     contextElement->addToPropertyMap(m_systemLanguage);
 }
 
 DEFINE_TRACE(SVGTests)
 {
     visitor->trace(m_requiredFeatures);
     visitor->trace(m_requiredExtensions);
     visitor->trace(m_systemLanguage);
@@ skipping 72 matching lines @@
 }
 
 void SVGTests::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
 {
     supportedAttributes.add(SVGNames::requiredFeaturesAttr);
     supportedAttributes.add(SVGNames::requiredExtensionsAttr);
     supportedAttributes.add(SVGNames::systemLanguageAttr);
 }
 
 }