Have NodeTraversal::nextSkippingChildren() take a reference

Source/core/html/HTMLSelectElement.cpp

Index: Source/core/html/HTMLSelectElement.cpp
diff --git a/Source/core/html/HTMLSelectElement.cpp b/Source/core/html/HTMLSelectElement.cpp
index 08de712583726bdb85064b38b5c91980faa4f546..0f693a918189e7e4003d63a99d540db22d4d0348 100644
--- a/Source/core/html/HTMLSelectElement.cpp
+++ b/Source/core/html/HTMLSelectElement.cpp
@@ -736,7 +736,7 @@ void HTMLSelectElement::recalcListItems(bool updateSelectedStates) const
     HTMLOptionElement* firstOption = 0;
     for (Element* currentElement = ElementTraversal::firstWithin(this); currentElement; ) {
         if (!currentElement->isHTMLElement()) {
-            currentElement = ElementTraversal::nextSkippingChildren(currentElement, this);
+            currentElement = ElementTraversal::nextSkippingChildren(*currentElement, this);
             continue;
         }
         HTMLElement* current = toHTMLElement(currentElement);
@@ -779,7 +779,7 @@ void HTMLSelectElement::recalcListItems(bool updateSelectedStates) const
         // with the case where odd tags like a <div> have been added but we
         // handle this because such tags have already been removed from the
         // <select>'s subtree at this point.
-        currentElement = ElementTraversal::nextSkippingChildren(currentElement, this);
+        currentElement = ElementTraversal::nextSkippingChildren(*currentElement, this);
     }
 
     if (!foundSelected && m_size <= 1 && firstOption && !firstOption->selected())