Use more references in ContainerNode code

Source/core/editing/ApplyStyleCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008, 2009 Apple 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 1010 matching lines @@
     if (!highestAncestor)
         return;
 
     // The outer loop is traversing the tree vertically from highestAncestor to targetNode
     RefPtr<Node> current = highestAncestor;
     // Along the way, styled elements that contain targetNode are removed and accumulated into elementsToPushDown.
     // Each child of the removed element, exclusing ancestors of targetNode, is then wrapped by clones of elements in elementsToPushDown.
     Vector<RefPtr<Element> > elementsToPushDown;
     while (current && current != targetNode && current->contains(targetNode)) {
         NodeVector currentChildren;
-        getChildNodes(current.get(), currentChildren);
+        getChildNodes(*current, currentChildren);
         RefPtr<Element> styledElement;
         if (current->isStyledElement() && isStyledInlineElementToRemove(toElement(current))) {
             styledElement = toElement(current);
             elementsToPushDown.append(styledElement);
         }
 
         RefPtr<EditingStyle> styleToPushDown = EditingStyle::create();
         if (current->isHTMLElement())
             removeInlineStyleFromElement(style, toHTMLElement(current), RemoveIfNeeded, styleToPushDown.get());
 
@@ skipping 501 matching lines @@
         String textToMove = nextText->data();
         insertTextIntoNode(childText, childText->length(), textToMove);
         removeNode(next);
         // don't move child node pointer. it may want to merge with more text nodes.
     }
 
     updateStartEnd(newStart, newEnd);
 }
 
 }