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

Source/core/dom/VisitedLinkState.cpp

Index: Source/core/dom/VisitedLinkState.cpp
diff --git a/Source/core/dom/VisitedLinkState.cpp b/Source/core/dom/VisitedLinkState.cpp
index b72f4ff57175817db7a4afdd0c06c3e3efedb1f2..e49512a85b112893d995f9b879729394d651c8d6 100644
--- a/Source/core/dom/VisitedLinkState.cpp
+++ b/Source/core/dom/VisitedLinkState.cpp
@@ -63,7 +63,7 @@ void VisitedLinkState::invalidateStyleForAllLinks()
 {
     if (m_linksCheckedForVisitedState.isEmpty())
         return;
-    for (Element* element = ElementTraversal::firstWithin(&m_document); element; element = ElementTraversal::next(element)) {
+    for (Element* element = ElementTraversal::firstWithin(&m_document); element; element = ElementTraversal::next(*element)) {
         if (element->isLink())
             element->setNeedsStyleRecalc();
     }
@@ -73,7 +73,7 @@ void VisitedLinkState::invalidateStyleForLink(LinkHash linkHash)
 {
     if (!m_linksCheckedForVisitedState.contains(linkHash))
         return;
-    for (Element* element = ElementTraversal::firstWithin(&m_document); element; element = ElementTraversal::next(element)) {
+    for (Element* element = ElementTraversal::firstWithin(&m_document); element; element = ElementTraversal::next(*element)) {
         if (element->isLink() && linkHashForElement(*element) == linkHash)
             element->setNeedsStyleRecalc();
     }