Have positionInParentBeforeNode() / positionInParentAfterNode() take a reference

Source/core/editing/InsertParagraphSeparatorCommand.cpp

Index: Source/core/editing/InsertParagraphSeparatorCommand.cpp
diff --git a/Source/core/editing/InsertParagraphSeparatorCommand.cpp b/Source/core/editing/InsertParagraphSeparatorCommand.cpp
index 0fddbb1943cef86385830b2eb0a27f6ad20c4fef..7f982205430f57b1261488288021694fffe2114a 100644
--- a/Source/core/editing/InsertParagraphSeparatorCommand.cpp
+++ b/Source/core/editing/InsertParagraphSeparatorCommand.cpp
@@ -313,7 +313,7 @@ void InsertParagraphSeparatorCommand::doApply()
     if (isStartOfParagraph(visiblePos)) {
         RefPtr<Element> br = createBreakElement(document());
         insertNodeAt(br.get(), insertionPosition);
-        insertionPosition = positionInParentAfterNode(br.get());
+        insertionPosition = positionInParentAfterNode(*br);
         // If the insertion point is a break element, there is nothing else
         // we need to do.
         if (visiblePos.deepEquivalent().anchorNode()->renderer()->isBR()) {