Add [TypeChecking=Interface] to XPath interfaces

Source/core/xml/XPathExpression.cpp

Index: Source/core/xml/XPathExpression.cpp
diff --git a/Source/core/xml/XPathExpression.cpp b/Source/core/xml/XPathExpression.cpp
index ab1cca46455f191dd399f43ccae77344260a5712..6025274a49f9705b905739f6cb9ed9bda3a4b70d 100644
--- a/Source/core/xml/XPathExpression.cpp
+++ b/Source/core/xml/XPathExpression.cpp
@@ -63,13 +63,8 @@ DEFINE_TRACE(XPathExpression)
     visitor->trace(m_topExpression);
 }
 
-PassRefPtrWillBeRawPtr<XPathResult> XPathExpression::evaluate(Node* contextNode, unsigned short type, XPathResult*, ExceptionState& exceptionState)
+PassRefPtrWillBeRawPtr<XPathResult> XPathExpression::evaluate(Node* contextNode, unsigned short type, const ScriptValue&, ExceptionState& exceptionState)
 {
-    if (!contextNode) {
-        exceptionState.throwDOMException(NotSupportedError, "The context node provided is null.");
-        return nullptr;
-    }
-
     if (!isValidContextNode(contextNode)) {
         exceptionState.throwDOMException(NotSupportedError, "The node provided is '" + contextNode->nodeName() + "', which is not a valid context node type.");
         return nullptr;