Remove children of title node before updating

Source/core/html/HTMLTitleElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2010 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 74 matching lines @@
 {
     RefPtr<Node> protectFromMutationEvents(this);
 
     int numChildren = childNodeCount();
 
     if (numChildren == 1 && firstChild()->isTextNode())
         toText(firstChild())->setData(value);
     else {
         // We make a copy here because entity of "value" argument can be Document::m_title,
         // which goes empty during removeChildren() invocation below,
-        // which causes HTMLTitleElement::childrenChanged(), which ends up Document::setTitle().
+        // which causes HTMLTitleElement::childrenChanged(), which ends up in Document::setTitleElement().
         String valueCopy(value);
 
         if (numChildren > 0)
             removeChildren();
 
         appendChild(document().createTextNode(valueCopy.impl()), IGNORE_EXCEPTION);
     }
 }
 
 }