Have ElementTraversal / NodeTraversal's next() methods take a reference

Source/core/html/HTMLOptionElement.cpp

Index: Source/core/html/HTMLOptionElement.cpp
diff --git a/Source/core/html/HTMLOptionElement.cpp b/Source/core/html/HTMLOptionElement.cpp
index 85dffe1e993a33ce1dcfedb8d1253e4b9abd6248..49d98190dec18d359183bded173af614908fda4c 100644
--- a/Source/core/html/HTMLOptionElement.cpp
+++ b/Source/core/html/HTMLOptionElement.cpp
@@ -367,7 +367,7 @@ String HTMLOptionElement::collectOptionInnerText() const
         if (node->isElementNode() && toScriptLoaderIfPossible(toElement(node)))
             node = NodeTraversal::nextSkippingChildren(node, this);
         else
-            node = NodeTraversal::next(node, this);
+            node = NodeTraversal::next(*node, this);
     }
     return text.toString();
 }