Oilpan: revert SVG GC mixin constructor workaround.

Source/core/svg/SVGUseElement.cpp

Index: Source/core/svg/SVGUseElement.cpp
diff --git a/Source/core/svg/SVGUseElement.cpp b/Source/core/svg/SVGUseElement.cpp
index 300a62622fbe4f3eb7813109826c004978daa8f1..fa5f94a07182a70651463b2dad6d5eefdc4f436d 100644
--- a/Source/core/svg/SVGUseElement.cpp
+++ b/Source/core/svg/SVGUseElement.cpp
@@ -45,6 +45,7 @@ namespace blink {
 
 inline SVGUseElement::SVGUseElement(Document& document)
     : SVGGraphicsElement(SVGNames::useTag, document)
+    , SVGURIReference(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))
@@ -53,8 +54,6 @@ inline SVGUseElement::SVGUseElement(Document& document)
     , m_needsShadowTreeRecreation(false)
     , m_svgLoadEventTimer(this, &SVGElement::svgLoadEventTimerFired)
 {
-    SVGURIReference::initialize(this);
-
     ASSERT(hasCustomStyleCallbacks());
 
     addToPropertyMap(m_x);