Use DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION to generate toSVGSMILElement()

Source/core/svg/animation/SVGSMILElement.cpp

Index: Source/core/svg/animation/SVGSMILElement.cpp
diff --git a/Source/core/svg/animation/SVGSMILElement.cpp b/Source/core/svg/animation/SVGSMILElement.cpp
index e583a7be96ed0c4e3f61e079df12b3ed232046ab..c8a3014aa6b709f073034e01da592986037b42e5 100644
--- a/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/Source/core/svg/animation/SVGSMILElement.cpp
@@ -460,14 +460,6 @@ bool SVGSMILElement::parseCondition(const String& value, BeginOrEnd beginOrEnd)
     return true;
 }
 
-bool SVGSMILElement::isSMILElement(Node* node)
-{
-    if (!node)
-        return false;
-    return node->hasTagName(SVGNames::setTag) || node->hasTagName(SVGNames::animateTag) || node->hasTagName(SVGNames::animateMotionTag)
-            || node->hasTagName(SVGNames::animateTransformTag) || node->hasTagName(SVGNames::animateColorTag);
-}
-
 void SVGSMILElement::parseBeginOrEnd(const String& parseString, BeginOrEnd beginOrEnd)
 {
     Vector<SMILTimeWithOrigin>& timeList = beginOrEnd == Begin ? m_beginTimes : m_endTimes;
@@ -586,7 +578,7 @@ void SVGSMILElement::connectConditions()
         } else if (condition.m_type == Condition::Syncbase) {
             ASSERT(!condition.m_baseID.isEmpty());
             condition.m_syncbase = treeScope().getElementById(condition.m_baseID);
-            if (!isSMILElement(condition.m_syncbase.get())) {
+            if (!condition.m_syncbase || !isSVGSMILElement(*condition.m_syncbase)) {
                 condition.m_syncbase = 0;
                 continue;
             }