Remove the Vector::append overload that takes a Vector

Source/core/xml/XPathNodeSet.h

Index: Source/core/xml/XPathNodeSet.h
diff --git a/Source/core/xml/XPathNodeSet.h b/Source/core/xml/XPathNodeSet.h
index c90e395ded4b6ac42b4b7b13ec5a2706831f0bfb..ab9d763ffbf87ba36ac9e9216ff78e751f392f6d 100644
--- a/Source/core/xml/XPathNodeSet.h
+++ b/Source/core/xml/XPathNodeSet.h
@@ -50,7 +50,7 @@ namespace WebCore {
             // NodeSet itself does not verify that nodes in it are unique.
             void append(Node* node) { m_nodes.append(node); }
             void append(PassRefPtr<Node> node) { m_nodes.append(node); }
-            void append(const NodeSet& nodeSet) { m_nodes.append(nodeSet.m_nodes); }
+            void append(const NodeSet& nodeSet) { m_nodes.appendVector(nodeSet.m_nodes); }
 
             // Returns the set's first node in document order, or 0 if the set is empty.
             Node* firstNode() const;