Have NodeWithIndex deal with references instead of pointers

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index aa0664410bf10ba752b247b1c1608d27c25b1656..a253d618895f3973cd44d361c383770f48362b7c 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -666,8 +666,8 @@ public:
 
     void didInsertText(Node*, unsigned offset, unsigned length);
     void didRemoveText(Node*, unsigned offset, unsigned length);
-    void didMergeTextNodes(Text* oldNode, unsigned offset);
-    void didSplitTextNode(Text* oldNode);
+    void didMergeTextNodes(Text& oldNode, unsigned offset);
+    void didSplitTextNode(Text& oldNode);
 
     void clearDOMWindow() { m_domWindow = 0; }
     DOMWindow* domWindow() const { return m_domWindow; }