Revert of Have Position deal with more references

Source/core/editing/InsertLineBreakCommand.cpp

Index: Source/core/editing/InsertLineBreakCommand.cpp
diff --git a/Source/core/editing/InsertLineBreakCommand.cpp b/Source/core/editing/InsertLineBreakCommand.cpp
index 157656710a3a794e8a4d9c2377e8fba7c03d060a..5270238d9484c1824f62e95d00a0d919b2ccc811 100644
--- a/Source/core/editing/InsertLineBreakCommand.cpp
+++ b/Source/core/editing/InsertLineBreakCommand.cpp
@@ -97,13 +97,13 @@
         if (needExtraLineBreak)
             insertNodeBefore(nodeToInsert->cloneNode(false), nodeToInsert);
 
-        VisiblePosition endingPosition(positionBeforeNode(*nodeToInsert));
+        VisiblePosition endingPosition(positionBeforeNode(nodeToInsert.get()));
         setEndingSelection(VisibleSelection(endingPosition, endingSelection().isDirectional()));
     } else if (pos.deprecatedEditingOffset() <= caretMinOffset(pos.deprecatedNode())) {
         insertNodeAt(nodeToInsert.get(), pos);
 
         // Insert an extra br or '\n' if the just inserted one collapsed.
-        if (!isStartOfParagraph(VisiblePosition(positionBeforeNode(*nodeToInsert))))
+        if (!isStartOfParagraph(VisiblePosition(positionBeforeNode(nodeToInsert.get()))))
             insertNodeBefore(nodeToInsert->cloneNode(false).get(), nodeToInsert.get());
 
         setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), DOWNSTREAM, endingSelection().isDirectional()));