Simpler return value of HashTable::add/HashMap:add and others

Source/core/html/HTMLCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. 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 559 matching lines @@
 
     for (unsigned i = 0; idResults && i < idResults->size(); ++i)
         result.append(idResults->at(i));
 
     for (unsigned i = 0; nameResults && i < nameResults->size(); ++i)
         result.append(nameResults->at(i));
 }
 
 void HTMLCollection::append(NodeCacheMap& map, const AtomicString& key, Element* element)
 {
-    OwnPtr<Vector<Element*> >& vector = map.add(key.impl(), nullptr).iterator->value;
+    OwnPtr<Vector<Element*> >& vector = map.add(key.impl(), nullptr).storedValue->value;
     if (!vector)
         vector = adoptPtr(new Vector<Element*>);
     vector->append(element);
 }
 
 } // namespace WebCore