Store SVGElement instead of SVGElementInstance for instancesForElement

Source/core/svg/SVGAnimateMotionElement.cpp

Index: Source/core/svg/SVGAnimateMotionElement.cpp
diff --git a/Source/core/svg/SVGAnimateMotionElement.cpp b/Source/core/svg/SVGAnimateMotionElement.cpp
index 1ade309a68fe5458d37b1c1824db46d88867839a..b3c07da51c386001385186e964684d555207eb25 100644
--- a/Source/core/svg/SVGAnimateMotionElement.cpp
+++ b/Source/core/svg/SVGAnimateMotionElement.cpp
@@ -309,10 +309,10 @@ void SVGAnimateMotionElement::applyResultsToTarget()
         return;
 
     // ...except in case where we have additional instances in <use> trees.
-    const HashSet<SVGElementInstance*>& instances = targetElement->instancesForElement();
-    const HashSet<SVGElementInstance*>::const_iterator end = instances.end();
-    for (HashSet<SVGElementInstance*>::const_iterator it = instances.begin(); it != end; ++it) {
-        SVGElement* shadowTreeElement = (*it)->shadowTreeElement();
+    const HashSet<SVGElement*>& instances = targetElement->instancesForElement();
+    const HashSet<SVGElement*>::const_iterator end = instances.end();
+    for (HashSet<SVGElement*>::const_iterator it = instances.begin(); it != end; ++it) {
+        SVGElement* shadowTreeElement = *it;
         ASSERT(shadowTreeElement);
         AffineTransform* transform = shadowTreeElement->supplementalTransform();
         if (!transform)