Have NodeTraversal::nextSkippingChildren() take a reference

Source/core/editing/DeleteSelectionCommand.cpp

Index: Source/core/editing/DeleteSelectionCommand.cpp
diff --git a/Source/core/editing/DeleteSelectionCommand.cpp b/Source/core/editing/DeleteSelectionCommand.cpp
index 3fc44584c7440334205c86601d43ffd155e7823c..ce27bb711cf0898ce1eb7760c9b3a2d8e635bdc6 100644
--- a/Source/core/editing/DeleteSelectionCommand.cpp
+++ b/Source/core/editing/DeleteSelectionCommand.cpp
@@ -431,7 +431,7 @@ void DeleteSelectionCommand::makeStylingElementsDirectChildrenOfEditableRootToPr
     while (node && node != range->pastLastNode()) {
         RefPtr<Node> nextNode = NodeTraversal::next(*node);
         if ((node->hasTagName(styleTag) && !(toElement(node)->hasAttribute(scopedAttr))) || node->hasTagName(linkTag)) {
-            nextNode = NodeTraversal::nextSkippingChildren(node.get());
+            nextNode = NodeTraversal::nextSkippingChildren(*node);
             RefPtr<ContainerNode> rootEditableElement = node->rootEditableElement();
             if (rootEditableElement.get()) {
                 removeNode(node);
@@ -468,7 +468,7 @@ void DeleteSelectionCommand::handleGeneralDelete()
     }
 
     if (startOffset >= lastOffsetForEditing(startNode)) {
-        startNode = NodeTraversal::nextSkippingChildren(startNode);
+        startNode = NodeTraversal::nextSkippingChildren(*startNode);
         startOffset = 0;
     }
 
@@ -517,7 +517,7 @@ void DeleteSelectionCommand::handleGeneralDelete()
                 // NodeTraversal::nextSkippingChildren just blew past the end position, so stop deleting
                 node = 0;
             } else if (!m_downstreamEnd.deprecatedNode()->isDescendantOf(node.get())) {
-                RefPtr<Node> nextNode = NodeTraversal::nextSkippingChildren(node.get());
+                RefPtr<Node> nextNode = NodeTraversal::nextSkippingChildren(*node);
                 // if we just removed a node from the end container, update end position so the
                 // check above will work
                 updatePositionForNodeRemoval(m_downstreamEnd, node.get());