Revert of Have Position deal with more references

Source/core/editing/InsertLineBreakCommand.cpp

 /*
  * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 79 matching lines @@
     // FIXME: Need to merge text nodes when inserting just after or before text.
 
     if (isEndOfParagraph(caret) && !lineBreakExistsAtVisiblePosition(caret)) {
         bool needExtraLineBreak = !pos.deprecatedNode()->hasTagName(hrTag) && !pos.deprecatedNode()->hasTagName(tableTag);
 
         insertNodeAt(nodeToInsert.get(), pos);
 
         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()));
     // If we're inserting after all of the rendered text in a text node, or into a non-text node,
     // a simple insertion is sufficient.
     } else if (pos.deprecatedEditingOffset() >= caretMaxOffset(pos.deprecatedNode()) || !pos.deprecatedNode()->isTextNode()) {
         insertNodeAt(nodeToInsert.get(), pos);
         setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), DOWNSTREAM, endingSelection().isDirectional()));
     } else if (pos.deprecatedNode()->isTextNode()) {
         // Split a text node
@@ skipping 38 matching lines @@
         // before the line break (if the line break is at the end of a block it isn't selectable).
         // So, this next call sets the endingSelection() to a caret just after the line break
         // that we inserted, or just before it if it's at the end of a block.
         setEndingSelection(endingSelection().visibleEnd());
     }
 
     rebalanceWhitespace();
 }
 
 }