Oilpan: revert SVG GC mixin constructor workaround.

Source/core/svg/SVGSVGElement.cpp

Index: Source/core/svg/SVGSVGElement.cpp
diff --git a/Source/core/svg/SVGSVGElement.cpp b/Source/core/svg/SVGSVGElement.cpp
index 89ebeea9724a88b6bbcf0dc3060022dca6ff607f..21c3bc9e62e9e14e341108061079601f663e0ac2 100644
--- a/Source/core/svg/SVGSVGElement.cpp
+++ b/Source/core/svg/SVGSVGElement.cpp
@@ -61,6 +61,7 @@ namespace blink {
 
 inline SVGSVGElement::SVGSVGElement(Document& doc)
     : SVGGraphicsElement(SVGNames::svgTag, doc)
+    , SVGFitToViewBox(this)
     , m_x(SVGAnimatedLength::create(this, SVGNames::xAttr, SVGLength::create(SVGLengthMode::Width), AllowNegativeLengths))
     , m_y(SVGAnimatedLength::create(this, SVGNames::yAttr, SVGLength::create(SVGLengthMode::Height), AllowNegativeLengths))
     , m_width(SVGAnimatedLength::create(this, SVGNames::widthAttr, SVGLength::create(SVGLengthMode::Width), ForbidNegativeLengths))
@@ -69,8 +70,6 @@ inline SVGSVGElement::SVGSVGElement(Document& doc)
     , m_timeContainer(SMILTimeContainer::create(*this))
     , m_translation(SVGPoint::create())
 {
-    SVGFitToViewBox::initialize(this);
-
     m_width->setDefaultValueAsString("100%");
     m_height->setDefaultValueAsString("100%");