Have NodeWithIndex deal with references instead of pointers

Source/core/dom/Text.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 71 matching lines @@
         unsigned offset = length();
         String nextTextData = nextText->data();
         String oldTextData = data();
         setDataWithoutUpdate(data() + nextTextData);
         updateTextRenderer(oldTextData.length(), 0);
 
         // Empty nextText for layout update.
         nextText->setDataWithoutUpdate(emptyString());
         nextText->updateTextRenderer(0, nextTextData.length());
 
-        document().didMergeTextNodes(nextText.get(), offset);
+        document().didMergeTextNodes(*nextText, offset);
 
         // Restore nextText for mutation event.
         nextText->setDataWithoutUpdate(nextTextData);
         nextText->updateTextRenderer(0, 0);
 
         document().incDOMTreeVersion();
         didModifyData(oldTextData);
         nextText->remove(IGNORE_EXCEPTION);
     }
 
@@ skipping 18 matching lines @@
 
     if (parentNode())
         parentNode()->insertBefore(newText.get(), nextSibling(), exceptionState);
     if (exceptionState.hadException())
         return nullptr;
 
     if (renderer())
         toRenderText(renderer())->setTextWithOffset(dataImpl(), 0, oldStr.length());
 
     if (parentNode())
-        document().didSplitTextNode(this);
+        document().didSplitTextNode(*this);
 
     return newText.release();
 }
 
 static const Text* earliestLogicallyAdjacentTextNode(const Text* t)
 {
     const Node* n = t;
     while ((n = n->previousSibling())) {
         Node::NodeType type = n->nodeType();
         if (type == Node::TEXT_NODE || type == Node::CDATA_SECTION_NODE) {
@@ skipping 226 matching lines @@
             result.appendLiteral("; ");
         result.appendLiteral("value=");
         result.append(s);
     }
 
     strncpy(buffer, result.toString().utf8().data(), length - 1);
 }
 #endif
 
 } // namespace WebCore