Stop using SVGElementInstance in SVGElement

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 cdb277c033d1fc467a8d29f2b34f37f3188f3baa..6f1810fc5577b20348396ba8b71d26a62a1ec722 100644
--- a/Source/core/svg/SVGUseElement.cpp
+++ b/Source/core/svg/SVGUseElement.cpp
@@ -324,15 +324,15 @@ void SVGUseElement::scheduleShadowTreeRecreation()
 
 void SVGUseElement::clearResourceReferences()
 {
-    // FIXME: We should try to optimize this, to at least allow partial reclones.
-    if (ShadowRoot* shadowTreeRootElement = userAgentShadowRoot())
-        shadowTreeRootElement->removeChildren();
-
     if (m_targetElementInstance) {
         m_targetElementInstance->detach();
         m_targetElementInstance = nullptr;
     }
 
+    // FIXME: We should try to optimize this, to at least allow partial reclones.
+    if (ShadowRoot* shadowTreeRootElement = userAgentShadowRoot())
+        shadowTreeRootElement->removeChildren();
+
     m_needsShadowTreeRecreation = false;
     document().unscheduleUseShadowTreeUpdate(*this);