Oilpan: revert SVG GC mixin constructor workaround.

Source/core/svg/SVGViewSpec.cpp

Index: Source/core/svg/SVGViewSpec.cpp
diff --git a/Source/core/svg/SVGViewSpec.cpp b/Source/core/svg/SVGViewSpec.cpp
index 071e969517c018f1d43211232641f648faee73ba..73e42463ef4a4f177996530a5cebf97668f3af68 100644
--- a/Source/core/svg/SVGViewSpec.cpp
+++ b/Source/core/svg/SVGViewSpec.cpp
@@ -35,11 +35,10 @@ SVGViewSpec::SVGViewSpec(SVGSVGElement* contextElement)
     // This contextElement will be only used for keeping this alive from the tearoff.
     // SVGSVGElement holds a strong-ref to this SVGViewSpec, so this is kept alive as:
     // AnimatedProperty tearoff -(contextElement)-> SVGSVGElement -(RefPtr)-> SVGViewSpec.
-    : m_contextElement(contextElement)
+    : SVGFitToViewBox(contextElement, PropertyMapPolicySkip)
+    , m_contextElement(contextElement)
     , m_transform(SVGAnimatedTransformList::create(contextElement, SVGNames::transformAttr, SVGTransformList::create()))
 {
-    SVGFitToViewBox::initialize(contextElement, PropertyMapPolicySkip);
-
     ASSERT(m_contextElement);
 
     viewBox()->setReadOnly();