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

Source/core/css/PropertySetCSSStyleDeclaration.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. 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 274 matching lines @@
 CSSValue* AbstractPropertySetCSSStyleDeclaration::cloneAndCacheForCSSOM(CSSValue* internalValue)
 {
     if (!internalValue)
         return 0;
 
     // The map is here to maintain the object identity of the CSSValues over multiple invocations.
     // FIXME: It is likely that the identity is not important for web compatibility and this code should be removed.
     if (!m_cssomCSSValueClones)
         m_cssomCSSValueClones = adoptPtr(new HashMap<CSSValue*, RefPtr<CSSValue> >);
 
-    RefPtr<CSSValue>& clonedValue = m_cssomCSSValueClones->add(internalValue, RefPtr<CSSValue>()).iterator->value;
+    RefPtr<CSSValue>& clonedValue = m_cssomCSSValueClones->add(internalValue, RefPtr<CSSValue>()).storedValue->value;
     if (!clonedValue)
         clonedValue = internalValue->cloneForCSSOM();
     return clonedValue.get();
 }
 
 StyleSheetContents* AbstractPropertySetCSSStyleDeclaration::contextStyleSheet() const
 {
     CSSStyleSheet* cssStyleSheet = parentStyleSheet();
     return cssStyleSheet ? cssStyleSheet->contents() : 0;
 }
@@ skipping 92 matching lines @@
 {
     m_parentElement->ref();
 }
 
 void InlineCSSStyleDeclaration::deref()
 {
     m_parentElement->deref();
 }
 
 } // namespace WebCore