Get rid of useless calls to AtomicString::impl()

Source/core/html/HTMLFormElement.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) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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
@@ skipping 707 matching lines @@
                 hasInvalidControls = true;
         }
     }
     return hasInvalidControls;
 }
 
 Node* HTMLFormElement::elementFromPastNamesMap(const AtomicString& pastName) const
 {
     if (pastName.isEmpty() || !m_pastNamesMap)
         return 0;
-    Node* node = m_pastNamesMap->get(pastName.impl());
+    Node* node = m_pastNamesMap->get(pastName);
 #if !ASSERT_DISABLED
     if (!node)
         return 0;
     ASSERT_WITH_SECURITY_IMPLICATION(toHTMLElement(node)->form() == this);
     if (node->hasTagName(imgTag)) {
         ASSERT_WITH_SECURITY_IMPLICATION(m_imageElements.find(node) != kNotFound);
     } else if (node->hasTagName(objectTag)) {
         ASSERT_WITH_SECURITY_IMPLICATION(m_associatedElements.find(toHTMLObjectElement(node)) != kNotFound);
     } else {
         ASSERT_WITH_SECURITY_IMPLICATION(m_associatedElements.find(toHTMLFormControlElement(node)) != kNotFound);
     }
 #endif
     return node;
 }
 
 void HTMLFormElement::addToPastNamesMap(Node* element, const AtomicString& pastName)
 {
     if (pastName.isEmpty())
         return;
     if (!m_pastNamesMap)
         m_pastNamesMap = adoptPtr(new PastNamesMap);
-    m_pastNamesMap->set(pastName.impl(), element);
+    m_pastNamesMap->set(pastName, element);
 }
 
 void HTMLFormElement::removeFromPastNamesMap(HTMLElement& element)
 {
     if (!m_pastNamesMap)
         return;
     PastNamesMap::iterator end = m_pastNamesMap->end();
     for (PastNamesMap::iterator it = m_pastNamesMap->begin(); it != end; ++it) {
         if (it->value.get() == &element) {
             it->value = 0;
@@ skipping 60 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace