Oilpan: revert SVG GC mixin constructor workaround.

Source/core/svg/SVGTests.cpp

Index: Source/core/svg/SVGTests.cpp
diff --git a/Source/core/svg/SVGTests.cpp b/Source/core/svg/SVGTests.cpp
index 153b04ced62fd44931a1a6783d93cfd81aacb3b2..ff8120cb38209a74e75f25e7adffd3163959726f 100644
--- a/Source/core/svg/SVGTests.cpp
+++ b/Source/core/svg/SVGTests.cpp
@@ -30,21 +30,13 @@
 
 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);